The other day I walked up to Morty's Deli on Golden Gate Ave. in SF for a meatball sandwich. It was fabulous. Menu says "homemade meatballs, marinara, mozerella and parmesan on a sub roll" and it's $6.95 plus tax.
Meatballs were big, cut in half. You could taste the garlic, fennel seeds and oregano. Marinara was thick and tasty. Roll was perfectly toasted, and a substantial, delicious roll (could have been sourdough) that held up to the warm filling.