5-Ingredient Fix Contest Entry. As a busy Mom, the slow cooker is my friend! This recipe will allow a Sunday dinner any night of the week. Be sure not to over fill the center, or it will separate, exposing your mashed potatoes. The beef will shrink slightly in the slow cooker. The best way to easily remove your meat loaf in one piece is to use a slow cooker liner and remove it supporting the sides, keeping your meatloaf in one piece until ready to slice.