2 c. diced zucchini
1/2 c. chopped onion
1/2 tsp. basil
2 tbsp. butter
1 can Cheddar cheese soup
3 c. cooked macaroni
2 c. shredded Cheddar cheese
1 (16 oz.) can tomatoes, drained and chopped
1/2 tsp. mustard

Cook zucchini and onion in large skillet with basil until tender. Add remaining ingredients. Heat until cheese melts.