2 (16 oz.) cans refried beans
1/2 cup chopped onions
1 teaspoon minced garlic
1/2 cup shredded cheddar cheese + a little more for garnishing.
1/2 cup shredded mozzarella cheese*
Place everything in the crock pot and stir to combine. Cook on high for 1-2 hours or when they are hot throughout. Stir mixture a few times during the cooking. Top each serving with a little shredded cheese.
*If desired you can use all cheddar cheese.