1 1/2 cup uncooked elbow macaroni
2 cup chopped onion
2 tbsp canola oil
1 can (1/4-1/2oz) diced tomatoes, drained
1 can (10-3/4oz) condensed cheddar cheeses soup, undiluted
2 cup (8oz) shredded cheddar cheese
1/2 cup milk
1/2 tsp dried basil
1/2 tsp prepared mustard
2 cup chopped zucchini