It takes just 15 minutes to make.

I quickly discovered his ultimate comfort food and go-to sandwich: a simple yet irresistible four-ingredient meatball sub.

Well, that numbers about to skyrocket.

John Krasinski next to a sandwich with meatballs and basil

Simply Recipes / Getty Images / Kat Lieu

It took me around 15 minutes to make two meatball subs for lunch.

To assemble the subs, add three sauced-up meatballs to each hoagie roll.

Spoon the heated marinara sauce over the meatballs and top them with shredded mozzarella.

A meatball sub with basil, showing a cheese pull

Simply Recipes / Kat Lieu

How much cheese you add is up to you.

Despite my lactose intolerance, I added a generous sprinkle.

As is, the subs were delicious and so satisfying.