Nόστιμο παστίτσιο με μισές θερμίδες
penne pasta (250 grams) • lean ground beef (500 grams) • carrot, grated • onion, grated • red bell pepper, finely chopped • canned diced tomatoes (about 240 ml) • fresh parsley • low-fat milk, 1.5% (800 ml) • cornstarch (about 24 grams) • low-fat Greek yogurt, 2% (200 grams) • reduced-fat white cheese (like feta) (100 grams) • egg •