Sauté chopped onions in butter ... is simmering, make meatballs. Mix all meatball ingredients ... For fantastic meatball subs: Place into slightly toasted ... Makes about 40 meatballs.
Preheat oven to 450°F. Prepare ... cheese melts. Fill subs with hot tomato sauce, then 2 to 3 meatballs. Top subs with more sauce, then sprinkle with cheese.