Cook Penne Pasta (16 ounce) in a large pot of salt boiling water according to directions for al dente. Drain and set aside.
Meanwhile heat a large deep skillet over medium high heat. Remove casings from Sweet Italian Sausage (1 package) and brown, breaking it up into smaller pieces as it cooks. Once sausage is browned and no longer pink, add Garlic (2 clove) and cook for 30 seconds longer.
Reduce heat to medium and add Marinara Sauce (1 jar), scraping up browned bits on the bottom of the pan. Add Cream Cheese (8 ounce) and stir until melted. Add Fresh Baby Spinach (5 ounce), handfuls at a time, and stir until wilted.
If the skillet is large enough, add cooked pasta to sausage sauce and stir gently to coat. Otherwise, add pasta to a serving bowl or casserole dish and pour the sauce over it. Stir to combine.