Zucchini Hamburger Casserole

(From Annette)

This is a great way to use up fresh zucchini from your garden.

1 lb ground beef (or turkey)
6-8 cups cubed zucchini
4 medium to large carrots, sliced
1 medium potato, cubed
1 onion, chopped
4 slices bread, cubed
salt & pepper, to taste
1 (8 oz) can tomato sauce or stewed tomatoes
shredded cheese, to taste

*Preheat oven to 350 degrees. Brown ground beef and add remaining ingredients (except cheese). Simmer until vegetables are crisp-tender. Pour into a greased 3-quart baking dish. Sprinkle cheese over top and bake for 15-20 minutes or until bubbly.