Step 1

Melt butter and whisk in flour, salt, pepper, onion powder and garlic powder.

Step 2

Add milk, stirring constantly, until thickened.

Step 3

Remove from heat, add cheese and stir until melted.

Step 4

Put potatoes in greased 9×13 baking dish, top with green beans and then ham.

Step 5

Pour cheese sauce over all.

Step 6

Combine bread crumbs and butter; Sprinkle over top of casserole.

Step 7

Bake at 350° for 30 minutes.