Mornay Sauce Ham and Turkey Sandwich

By AislePrompt Editorial · Published 2026-04-16 · Updated 2026-04-16

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are drafted and published.

Classic Louisville-inspired sandwich with thinly sliced ham and turkey layered in creamy cheese sauce on hearty bread. This American-inspired quick recipe, ready in about 45 minutes, blends sourdough bread, ham, turkey 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 520 calories and feeds 2, 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: 30 min Cook: 15 min Serves 2 American cuisine 520 cal/serving

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Ingredients

4 slices (1/2 inch thick) sourdough bread
4 oz (thinly sliced, cooked) ham
4 oz (thinly sliced, cooked) turkey
2 tbsp (softened) butter
1/4 tsp salt
1/8 tsp black pepper
2 tbsp butter
2 tbsp all-purpose flour
1 cup milk
1/2 cup (shredded) Gruyere cheese
2 tbsp (shredded) Parmesan cheese
1/4 tsp nutmeg

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Instructions

Step 1: In a medium saucepan, melt 2 tbsp butter over medium heat. Whisk in 2 tbsp all-purpose flour and cook for 1 minute to form a roux.
Step 2: Gradually whisk in 1 cup milk until smooth. Cook for 3-4 minutes until sauce thickens enough to coat the back of a spoon.
Step 3: Remove from heat and stir in 1/2 cup shredded Gruyere, 2 tbsp shredded Parmesan, 1/4 tsp nutmeg, 1/4 tsp salt, and 1/8 tsp black pepper until melted and smooth.
Step 4: Spread 1/2 tbsp softened butter on one side of each bread slice. Place two slices butter-side down on a plate.
Step 5: Layer ham and turkey evenly over bread, then spread 1/4 cup Mornay sauce over meat.
Step 6: Top with remaining bread slices, butter-side up, and press gently to secure.