Sausage Potato Leek Dijon Mustard Hash Recipe: The One-Pan Recipe You'll Make on Repeat

One pan, 35 minutes, and the crispiest potatoes you'll make all week.

There's something deeply satisfying about a good hash. The way crispy, golden potatoes mingle with savoury sausage and sweet, tender leeks. The way a sharp, tangy mustard sauce cuts through the richness and ties everything together. And the way it all comes together in a single skillet, with minimal fuss and maximum flavour.

This is the sausage potato leek dijon mustard hash recipe you'll come back to time and again. It's become my go-to Sunday breakfast, my "clean out the fridge" dinner, and the dish I make when I want to impress without actually trying. The secret isn't fancy ingredients—it's technique.

Below is the recipe I've settled on after years of trial and error, plus the reasoning behind each step, the mistakes I made getting there, and answers to just about every hash-adjacent question people ask.

Photo Credit: MySmallRecipes

Why Dijon Belongs in a Sausage Hash

Sausage and potato is a rich, salty, fatty combination. Without something sharp, it flattens out after four or five bites. Dijon does three jobs at once: acetic acid from the wine or vinegar in it cuts the fat, the mustard's own emulsifying power turns the pan juices into a glossy sauce that clings, and the pungency wakes up the sweetness of the leeks.

Traditional Dijon mustard is made from brown or black mustard seed and white wine or verjuice, which is why it is sharper and less sweet than yellow ballpark mustard. Use a proper Dijon, and if you like texture, swap a teaspoon of it for whole-grain.

One warning: mustard's flavour compounds are volatile and its emulsion is heat-sensitive. Boil it and you get bitterness and a broken, grainy sauce. Add it off the heat, always. This is the single most important rule in this sausage potato leek dijon mustard hash recipe.

Ingredients

Serves 4 as a main, 6 as a side.

The Base

The Dijon Finish

How to Make This Sausage Potato Leek Dijon Mustard Hash Recipe

Step 1: Par-Boil the Potatoes

Put the diced potatoes in cold, well-salted water, bring to a boil, then simmer 6–8 minutes until a knife meets slight resistance. Drain and leave in the colander for five minutes to steam-dry. Give the colander a firm shake—the roughed-up, starchy edges are what turn into crunch.

Why this step matters: Par-boiling gelatinises the starch all the way to the centre, so the interior is fluffy before the exterior burns, and it creates a thin layer of starch slurry on the surface that fries into a shatteringly crisp shell. Kenji López-Alt's crispy roast potato method at Serious Eats demonstrates the same principle in the oven.

Step 2: Brown the Sausage

Heat a 30 cm cast-iron or carbon-steel skillet over medium-high. Add 1 tbsp oil and the sausage, breaking it into large craggy pieces. Cook 6–7 minutes until deeply browned, then lift it out with a slotted spoon, leaving the fat behind.

Which sausage to choose: A coarse-ground pork sausage seasoned with fennel or sage is the best match for Dijon. Look for a short ingredient list and a reasonable fat content—around 20–25%—because that fat is your cooking medium. Cook fresh pork sausage to an internal temperature of 71°C / 160°F, per the USDA safe minimum internal temperature chart.

Step 3: Crisp the Potatoes

Add the remaining oil to the rendered fat, then the dry potatoes in a single layer. Now do nothing for 5 minutes. Toss once, spread out again, and repeat for another 5–8 minutes until they are golden on most sides. Season with salt only now.

Why you must not stir: Browning is the Maillard reaction plus starch caramelisation, and both need sustained surface contact above about 140°C. Every stir breaks that contact and drops the pan temperature. Constant stirring is the single most common reason home hash comes out pale and soft.

Step 4: Add the Leeks

Push the potatoes to one side, add the leeks, garlic and thyme, and cook 4–5 minutes until the leeks are soft and just catching colour at the edges. Fold everything together with the sausage and warm through for a minute.

Preparing the leeks: Leeks grow half-buried, so soil gets trapped between the layers. Trim the root plate and the tough dark tops, slice the rest, then swish the slices in a bowl of cold water and lift them out with your hands—grit sinks, and if you tip the bowl into a colander you pour it straight back over. Keep the dark tops for stock; they are too fibrous to sauté but full of flavour.

Leeks are also worth eating for their own sake: they are a good source of the prebiotic fibre inulin, vitamin K and manganese, as detailed in this overview of leek nutrition from Healthline.

Step 5: Make the Dijon Finish (Off the Heat)

Take the pan off the burner and wait 30 seconds. Whisk the Dijon, stock and vinegar together in a cup, pour it in, and stir—it will sizzle, thicken and coat everything. Stir in the cream if using.

This is the defining moment of this sausage potato leek dijon mustard hash recipe. The mustard goes in off the heat—that is the one step most recipes get wrong.

Step 6: Finish and Serve

Taste, add pepper and more vinegar if it needs lift, scatter with parsley and chives, and serve straight from the pan with fried eggs on top.

Choosing the Right Potato

Waxy and all-rounder potatoes hold their shape; floury bakers such as Russet or Maris Piper break apart into a shaggy mess. That mess is delicious in its own way—more crispy edges—but it will not give you distinct cubes. Yukon Gold is the sensible middle ground and the one I use.

Store potatoes somewhere cool, dark and airy, never the fridge. Cold storage converts starch to sugar, which makes potatoes brown too fast and taste oddly sweet—see University of Minnesota Extension on handling and storage.

Common Mistakes (I Have Made All of Them)

Variations to Try

Cowboy Hash

Swap the sausage for smoked sausage or ground beef, add diced bell pepper, black beans and corn, and season with 1 tsp each of chili powder and smoked paprika. Finish with cheddar under the grill rather than Dijon.

Hillbilly Hash

Ground breakfast sausage, potatoes, onion, and a can of cream-style corn or diced tomatoes stirred in at the end, topped with melted cheese and a fried egg. Rustic, cheap and genuinely good.

Hobo Hash

Add sliced carrot with the potatoes, keep the seasoning to salt, pepper and butter, and either cook in the skillet or seal in foil packets over campfire coals for 25 minutes.

Vegetarian

Use a good plant-based sausage plus 200 g sliced chestnut mushrooms browned hard for depth, and 2 tbsp olive oil in place of rendered fat. Add a splash of soy sauce with the stock.

What to Serve With It

• Fried, poached or jammy soft-boiled eggs—the yolk becomes a second sauce

• A sharp green salad with lemon and mustard vinaigrette

• Quick-pickled red onions or cornichons for acidity

• Wilted kale or buttered greens

• Crusty sourdough, and a cold pale ale or dry cider

Storage, Reheating and Freezing

Refrigerate leftovers in a shallow airtight container within two hours and eat within 3–4 days—the FoodSafety.gov cold food storage chart is the reference I use for cooked meat and mixed dishes.

To freeze, spread the cooled hash flat in a zip bag and freeze up to 3 months. Reheat from frozen in a hot, lightly oiled skillet—never the microwave, which turns the crust to sponge. If you plan to freeze it, leave out the cream and stir it in on reheating, since dairy tends to split.

Frequently Asked Questions

How do you make sausage, leek, and potato hash?

Par-boil diced potatoes for 6–8 minutes, brown crumbled or sliced sausage in a heavy skillet, remove it, then crisp the drained potatoes undisturbed in the rendered fat for 8–10 minutes. Add sliced leeks for the last 5 minutes, return the sausage, and finish off the heat with Dijon mustard loosened with a splash of stock or cream. Season, then serve. This is the classic sausage potato leek dijon mustard hash recipe method.

Should you boil potatoes before making a hash? Do I need to?

You do not have to, but a 6–8 minute par-boil is the single biggest upgrade you can make. It gelatinises the starch so the interior is fluffy by the time the outside browns, and it roughs up the surface for extra crunch. Skipping it means small dice and a longer, lower-heat cook.

What are some tips for perfect potato hash?

Dry the potatoes thoroughly, use a preheated cast-iron or carbon-steel pan, work in a single layer, and leave them alone for several minutes at a time. Salt at the end of browning, not the start, so the surface stays dry.

What are common mistakes when making hash?

Overcrowding the pan so the potatoes steam; wet potatoes; a nonstick pan that never gets hot enough; stirring constantly; adding mustard or dairy over high heat so it splits; and cutting the pieces unevenly so some burn while others stay raw.

What kind of oil is best for potato hash?

Anything with a high smoke point and a neutral flavour: refined avocado, sunflower, peanut, canola or ghee. Best of all is the rendered fat from the sausage, cut with a spoon of clarified butter at the end for flavour. Avoid extra-virgin olive oil and whole butter alone at high heat—see this smoke point comparison.

What pairs well with sausage and potatoes? What sauce goes well?

Serve with fried or poached eggs, a sharp green salad, quick-pickled onions, or buttered greens. Sauce-wise: Dijon cream, whole-grain mustard vinaigrette, garlic aioli, chimichurri, or a simple sour-cream-and-chive spoonful. Anything acidic cuts the fat.

Which part of the leek do you not use?

Discard the root plate and the toughest dark-green tops—they stay fibrous in a quick sauté. Do not bin them, though: those tops are excellent in stock. Use the white and pale-green sections for the hash, and wash them well, as grit hides between the layers.

What's the best store-bought sausage for this?

For this sausage potato leek dijon mustard hash recipe, a coarse-ground pork sausage with fennel or sage suits the Dijon best. Chicken-apple sausage is the leaner option; smoked kielbasa gives the most colour but less rendered fat, so add a tablespoon of oil. Check the label for a short ingredient list and at least 20% fat.

Sources & Further Reading

• USDA FSIS — Safe minimum internal temperature chart

• FoodSafety.gov — Cold food storage charts

• Serious Eats — The best crispy roast potatoes ever

• Serious Eats — What is the Maillard reaction?

• Healthline — Cooking oil smoke points

• Healthline — Leek nutrition and benefits

• University of Minnesota Extension — Potatoes: growing and storage

• USDA FoodData Central — Nutrient data