Heat oil in a large skillet over medium-high heat.

Add chicken and cook for 5 minutes, or until browned.

Add onion and zucchini and cook until slightly softened.

Stir in chopped fresh oregano.

Pour in stewed tomatoes and one can of water (using the empty tomato can).

Add the macaroni pasta from the Kraft Dinner package.

Bring the mixture to a boil, then reduce heat to a simmer.

Cover partially and simmer for 12 minutes, or until the pasta is tender.

Stir in the cheese sauce from the Kraft Dinner package.

Cook until the cheese sauce is heated through and well combined.

Serve immediately.