Pepperoni Pasta Salad

1 Lbs. Elbow macaroni cooked according to directions but add frozen vegetables for the last 3 minutes of cooking time.
1 Bag 1lbs. California style vegetables added to elbows during the last 3 minutes of cooking.
Drain the above well.
In large bowl add the above + remaining ingredients
1, 14.5 oz. can diced tomatoes , do not drain
2 ribs celery chopped
1/2 cup diced sweet onion
1 bell pepper chopped
1/2 of a 14 oz. bottle of your favorite Italian dressing
1/2 lb. Sandwich Pepperoni chopped into large pieces
Stir well & chill overnight. before serving stir in 1/2 cup of Feta Cheese or your favorite cheese as you desire!
1/2 cup Feta cheese