in a saucepan add in sauce, meatballs and spices. if using onion you can peel rince and dice and add in. you can also add in mushrooms if you want
if you prefer like I did I sliced my mushrooms and fried them in old bay , garlic and butter
let the meatballs simmer on about medium for 20 to 30 mins stirring often
turn the heat down to low and let simmer a little longer still checking and stirring occasionally
if you want to toast the sub roll do so in the oven
when the meatballs are fully hot in the middle get your rolls onto plates
open the roll. put provolone cheese down on both sides. if you fried mushrooms put those on top of the cheese. then put mozzarella cheese over that on both sides
take the meatballs and sauce and cover the cheese. the cheese will melt.
add any topping or condiment or none. your choice.
serve hot and enjoy