No-Boil Ravioli Lasagna recipe - frozen ravioli, spaghetti sauce, sausage/hamburger, ricotta, mozzarella - layer everything in a pan and bake. No need to precook the ravioli. Super quick casserole! Ready in 30 minutes. Make a great freezer meal! Assemble and freeze for later. Serve with a salad and crusty garlic bread for a quick weeknight meal.