I thought this was very good...I used the entire box of penne, a full jar of spaghetti sauce, omitted the spinach, used only one can of petite diced tomatoes(did not drain) and 4 oz of fat-free cream cheese and then took the advice from other reviews and added red pepper flake, onion and garlic powder and added a zucchini/squash blend (frozen) and perfect there were no leftovers from the 9 X 13 pan!