Sloppy Mexican Lasagna Serves 12. 2 pounds hamburger 1 onion, chopped 1 can black olives, chopped 1 can enchilada sauce 1 (16 ounce) jar Thick and Chunky Salsa 1 (15 ounce) can tomato sauce At least 16 ounces shredded Colby/jack cheese 1 can golden mushroom soup 18 corn tortillas Brown the ground beef with the onion, drain, add the olives, sauce, soup, and salsa, simmer over medium heat for 45 minutes to 1 hour to thicken. Spray a 13 x 9-inch baking pan with cooking spray. Layer 6 tortillas, 1/3 meat mixture and 1/3 cheese; repeat two more times. Bake at 350 degrees F for 30 to35 minutes until bubbly. Serve with your favorite salad or side dish and sour cream and guacamole.