1 lb. zucchini, thinly sliced
2 1/2 tbsp. flour
2 tbsp. melted butter
1 c. milk
1/2 c. Cheddar cheese, shredded
2 c. chopped cooked ham
1 med. onion, sliced
1 c. bread crumbs
3 tbsp. melted butter
1/4 c. Parmesan cheese

Cook zucchini in boiling salted water, about 5 minutes. Drain. Add flour to 2 tablespoons butter. Stir in milk and cheese. Cook until thickened. Stir in ham. Place zucchini in bottom of shallow baking dish. Arrange onion rings over zucchini. Salt and pepper to taste. Spoon sauce over vegetables. Mix crumbs with 3 tablespoons butter and Parmesan cheese. Sprinkle over top. Bake in preheated 350 degree oven for 20 minutes.