4 to 5 onions, sliced
1 can cream of mushroom soup
1/2 cup milk
1 cup grated Cheddar cheese
1 stick butter
1 cup sour cream
2 beaten eggs
1 cup Mozzarella cheese, grated
1 pkg. Saltines, crushed

Sauté onions in butter. Mix soup, sour cream, beaten eggs and milk. In a casserole dish, put a layer of onions, cover with soup mixture. Then sprinkle with grated cheese. Another layer of onions, etc. Top with crushed Saltines.

Bake at 350°F for 30 to 40 minutes.