I use either chicken breasts, sliced thin (fajitas-Spanish for little belts) or beef, sliced the same way, sometimes I use shredded leftover roast, or shredded leftover deli chicken. The best is Zesty Italian dressing, pour 2-3 tablespoons into a skillet, get your skillet hot like you would for stir-fry. Saute strips of bell pepper and onion until slightly limp, remove from skillet, cook your meat the same way. You may have to add a little more dressing to the skillet. Watch closely because it cooks fast. I serve the fajitas with guacamole, shredded cheese, shredded lettuce, diced tomatoes and salsa in a tortilla. These are a real hit whenever I serve them.