Hamburger and Macaroni Casserole

1 pound ground beef or ground turkey
1 pound elbow pasta, cooked
1 small bottle of ketchup
1 ketchup bottle of water
1 small can chopped black olives
1 small can corn
1 can sliced mushrooms
1 onion, chopped
1 green pepper chopped
salt and pepper to taste

In a skillet, heat a bit of oil to saute the veggies. Start with the ground meat, oinions and green pepper. Meat should be brown. Add the drained macaroni and remaining ingredients. Mix until heated, then transfer to casserole dish. Cover and bake for 45 minutes at 325 degrees.