Pioneer Woman's Meatball Subs

I made these last night and they are so delicious and so easy! They are one of Brad's favorites.

Ingredients:
1 pound 93% lean ground beef
1/2 cup bread crumbs (Panko or plain will work)
1 clove minced garlic
1/2 tsp. salt
Freshly ground black pepper
1/2 cup milk
1 Tbsp. olive oil
1/2 medium onion, diced
1 jar marinara sauce of your choice (I use olive oil and garlic)
Hoagie rolls of your choice (I use whole wheat)
Cheese of your choice (I use 2% shredded mozzarella or provolone slices)

Instructions:
Mix meat with bread crumbs, garlic, salt, pepper and milk. Knead together with hands. Roll into heaping tablespoon sized balls.

Heat the olive oil in a large skillet over medium heat. Add onions and cook for about 1 minute. Add meatballs in between the onions and brown for a minute or two.

Pour jar of marinara over the top, shake pan gently to mix.

Put a lid on it and allow to simmer for 20 minutes.

Serve on warm hoagie rolls (you can broil them with butter for a couple minutes if you want) with cheese. YUM!