CrockPot Vegetarian No Noodle Lasagna CrockPot Recipe. Use a 6qt slow cooker. 1 26 oz jar of your favorite pasta sauce, 1 small container of ricotta cheese (10-12 oz), 8 slices of mozzarella cheese, 2 cups shredded Italian cheese mix, 1 large eggplant, 3 summer squash, 1 pound of slices mushrooms, bag of baby spinach, 2 T warm water. Takes 7-8hours. See page for full recipe.