Mix sauce, tomatoes, and garlic (I use about 1 1/2 jars of sauce)

Add a little sauce to bottom of crock pot. Place single layer of ravioli, top with cheese.

Continue layering sauce, ravioli, and cheese (I get 3 layers in my 6qt crock). Cheese should be your top layer.

Cover crock and set on high for 3-4 hours (low setting will take 6+ hours)