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

Cook first 4 ingredients in a skillet until tender. Add remaining ingredients and cook until cheese melts. Stir often.