Cook until ground beef is no longer pink, breaking up beef as you cook.
Add onion, peppers, garlic, ground beef, dry mustard, chili powder, salt and pepper.
Add tomato paste, add canned tomatoes with juice, water, Worcestershire sauce and balasmic vinegar Add in rice.
Stir, cover and simmer for 5 minutes covered.
If you are using the cheese, sprinkle on top for last few minutes of cooking time with lid on.