Sausage Rigatoni with Spinach

rigatoni (or mezzi rigatoni)

sweet Italian sausage, ground or links (if buying links, cut them open and remove the ground meat)

garlic, peeled and minced

carton (14.5 ounces) Campbell’s Soups For Easy Cooking Savory Portobello Mushroom Soup (from the Soups for Easy Cooking line)

loosely packed cups fresh spinach leaves, cleaned and dried (about 3 good sized handfuls)