Best Spaghetti Sauce

2 cups frozen peppers and onions margarine 1 can Hunts Roasted Garlic and Onion Sauce 1 can diced tomatoes with basil, garlic and oregano 1 TB minced garlic 1/4 cup white sugar plus 1 TB molasses 1 can mushrooms, drained 16 oz spaghetti, cooked and drained with added margarine   Saute peppers and onions in…