If your freezer is anything like mine, you’re always the proud owner of a frozen banana plantation and an endless vat of leftover red sauce. Due to my boyfriend’s pizza dependency and my near-constant desire for spaghetti and meatballs, we are repeatedly inundated with leftover tomato-based sauces. I realize this is one of those “good problems”, but coming up with fresh takes on the sauce you had last Tuesday can be a bit of a brain teaser. I mean, how many times can you dump it on ziti before you go insane? But sometimes you get lucky. Yes, sometimes your brain takes pity on you and spits out a fully-formed food idea that genuinely makes you excited AND helps you wrangle your out-of-control freezer. These Beanball Parm Subs with Sautéed Spinach are one such idea.