In a 400 degree oven, toast your subs on a baking sheet for 6-8 minutes. (If using frozen chickpea meatballs instead of freshly made, place in a baking dish in the oven at the same temperature for 10 minutes)
Meanwhile, warm up the marinara sauce in a sauce pot on the stove.
Place the chickpea meatballs in the toasted sub rolls, top with the amount of marinara you desire, and sprinkle with parmesan. Devour!