Instant Pot Lasagna Soup his Instant Pot Lasagna Soup Recipe gives you all the flavors of lasagna in a soup! It’s rich tomato base and noodles complement that flavor of Italian Sausage. If you let it sit overnight, the noodles will absorb the sauce—you can eat it as a lasagna/goulash or you can stir in some chicken broth or pasta sauce and bring it back to consistency for soup.