Layered Potato and Ham Casserole with Dijon Cream Sauce

By · Reviewed by AislePrompt Editorial · ·

A comforting baked casserole featuring tender potatoes and ham layered in a creamy Dijon-infused sauce, topped with golden cheese. This american-inspired one pot ready in about 55 minutes blends unsalted butter, all-purpose flour, whole milk into a versatile sauce that lifts everything from grain bowls and roasted vegetables to grilled proteins — a small-batch staple worth keeping in the fridge. Each serving lands at about 420 calories and feeds 6, so a small batch covers several meals across the week without taking over the fridge. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 25 min Cook: 30 min Serves 6 American cuisine 420 cal/serving
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Ingredients

Instructions

  1. Step 1: Bring a large pot of salted water to a rolling boil. Add 2 large peeled russet potatoes and cook for 10-12 minutes until fork-tender, then drain well and return to the pot.
  2. Step 2: In a medium saucepan over medium heat, melt 1/2 cup unsalted butter. Whisk in 1/2 cup all-purpose flour until smooth, then cook for 1 minute. Gradually whisk in 2 cups whole milk, stirring constantly until thickened (about 5 minutes).
  3. Step 3: Remove saucepan from heat and stir in 1/4 cup Dijon mustard, 1/4 cup finely chopped fresh parsley, 1 teaspoon salt, and 1/2 teaspoon black pepper. Return to low heat and simmer for 2 minutes to meld flavors.
  4. Step 4: While sauce simmers, mash the drained potatoes with a potato masher until mostly smooth. In a large bowl, combine mashed potatoes with 1 1/2 cups diced cooked ham. Stir in the hot sauce until evenly incorporated.
  5. Step 5: Transfer mixture to a greased 9x13-inch baking dish and spread evenly. Sprinkle 1 cup shredded cheddar cheese over the top. Bake at 375°F for 25-30 minutes until cheese is melted and edges are golden.

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Frequently asked questions

How long does Layered Potato and Ham Casserole with Dijon Cream Sauce take to make?

Total time is about 55 minutes (25 min prep + 30 min cook). A small batch typically covers several meals in the week — store as the recipe directs.

How do I store leftover Layered Potato and Ham Casserole with Dijon Cream Sauce?

Transfer to an airtight jar and refrigerate for up to 5–7 days. Most sauces freeze well for up to 2 months — portion into small containers or freezer bags so you can thaw only what you need. Stir before serving; cream- or yogurt-based sauces may separate on standing.

Can I substitute ingredients in Layered Potato and Ham Casserole with Dijon Cream Sauce?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Layered Potato and Ham Casserole with Dijon Cream Sauce for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Layered Potato and Ham Casserole with Dijon Cream Sauce?

American one pot like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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