Mini Meatball Sandwiches

This recipe has become a favorite of mine recently.
 It is easy and delicious and everyone likes it.
DING DING DING! It's a winner!
 I got it from Pioneer Woman--you can read it for yourself here, with pictures and a printable copy.

Or read my short version:
(double this recipe to serve approx. 8)

Meatballs:
1 lb. ground beef
1/2 c. bread crumbs
1/2 c. milk
1/2 t. salt
pepper
1 clove garlic

2 T. olive oil
1/2 onion, diced
1 jar marinara sauce
12 dinner rolls
provolone cheese

Mix the first six ingredients.
Heat oil in skillet and add onion, cook for 1 minute.
Add meatballs--I use a cookie scoop and plop them straight from the bowl into the skillet as fast as I can scoop.
Cook for a couple of minutes, turning to brown both sides.
Pour marinara sauce over, cover and simmer 20 minutes, or until centers are done.
(Perfect amount of time to make a salad and set the table!)
Spoon meatballs and sauce onto rolls and a slice of provolone cheese.
Keep your napkin handy!