1 lb. ground beef
4 c. sliced or diced zucchini
1 c. mayonnaise
1 c. Cheddar cheese
1 c. Parmesan cheese
2 eggs
1 onion, chopped
Salt and pepper

Cook zucchini in 2 cups boiling water until tender. Brown beef and onion; mix all ingredients together. Pour in casserole dish. Dot with butter and cover with bread crumbs. Bake 1 hour at 350 degrees.