Mini Meatball Sub Casserole

This Mini Meatball Sub Casserole is a beef casserole recipe that tastes just like a meatball sub with its individual mini subs made from meatballs and biscuits. This is a new type of meatball sub recipe that makes it easy to whip up a quick dinner. You only need four ingredients to enjoy a delicious, cheesy casserole. Crescent rounds, frozen meatballs, jarred marinara sauce and mozzarella turns into a mini sub casserole smothered in gooey cheese. You will not be disappointed with this four-ingredient weeknight dinner.