This has been sitting in my recipe file for decades and I don't think I've made it since before my husband passed. It's an easy dish to make and fills you up and tastes good too. Good if you're on a budget.
Cook macaroni according to package directions; drain.
Place butter in a large skillet. Add onion and celery and cook slightly (5 minutes--do not brown) over medium-low heat. Add ground beef and fry until browned. Season with salt and pepper to taste. Stir in tomato sauce and simmer, covered, until heated through.
Pour the hot meat sauce over the macaroni and serve immediately.