Get some beef, tomatoes and buns, and you're ready to make America's favorite messy sandwich: sloppy joes! But if you enjoy a little more depth when it comes to flavor combinations, bring on some heat with Southwestern Sloppy Joes. Green chilies give this special sandwich a kick. If you're not ready for it, cook a milder version sans chili peppers. The meat mixture features chunks of onion, celery and tomatoes flavored with cumin, brown sugar and other ingredients. Use lean beef that's rich in iron, zinc and B vitamins for maximum nutritional value. Coming in at only 190 calories per serving, this recipe is relatively healthy, feeds a sizeable group and only takes 20 minutes to make, so go ahead invite guests! Serve on whole-wheat buns or your favorite alternative bread.