Ham Casserole

Preheat oven to 350 degrees F (175 degrees C).

Place potatoes, celery, and carrot in a large pot and cover with water; bring to a boil.

Reduce heat to medium-low and simmer until tender, about 20 minutes.

Drain and transfer to a 2-quart baking dish.

Melt 3 tablespoons butter in a large skillet over medium heat; cook and stir ham, green bell pepper, and onion until vegetables are tender, about 5 minutes.

Transfer ham mixture to baking dish and mix with potatoes.

Melt remaining 1/4 cup butter in a clean skillet; cook and stir flour in melted butter until smooth, about 3 minutes.

Gradually stir in milk and season with salt and black pepper.

Bring to a boil, stirring constantly, until thickened, about 2 minutes.

Add Cheddar cheese; stir until melted.

Pour cheese mixture over ham and potatoes.

Sprinkle with bread crumbs.

Bake in preheated oven until bubbly, 25 to 30 minutes.

Allow casserole to rest for 5 to 10 minutes before serving.