Baked Spaghetti

12 ounces spaghetti
1 pound ground beef or turkey
1 onion, chopped
1 (26 ounce) jar spaghetti sauce
2 cups water
2 cups shredded mozzarella cheese

Brown beef and onion in a large pot. Drain. Mix in spaghetti sauce and water.

Break pasta into 1 or 2-inch pieces and stir to coat with sauce. Pour into a greased 9 x13-inch casserole dish. Top with cheese. Cover tightly with aluminum foil. Bake for 90 minutes at 325 degrees F.