This recipe came from the Southern Plate. She has some awesome easy to make recipes.
2 lbs ground beef, browned and drained
2 C Mozzarella
1 Dozen sub rolls
2 - 15 oz jars of pizza sauce
Add one and a half jars of pizza sauce to beef in skillet. Stir and cook on medium until bubbly. Slice each bun almost through and spoon beef mixture into the bun. Add cheese on top and seal with plastic wrap. Place in refrigerator and heat in microwave for one minute when ready to eat. Can be stored in fridge for several days.
To see pictures and step by step instructions visit her site.