Refried beans, chicken, and vegetables are layered on a pita and topped with tomatoes and cheese in this variation of the popular Tex-Mex main-dish recipe.
Heat oven to 350°F. Cut pitas in half horizontally. On each pita half, spread 3 heaping tablespoons refried beans. Place pitas on 2 baking sheets; cover with aluminum foil. Place in the oven for 15 minutes.
Heat oil in a large nonstick skillet over medium-high heat. Add onion and pepper to skillet; cook for 5 minutes. Stir chicken and fajita seasoning into skillet. Cook for 5 minutes, stirring, until chicken is cooked through.
Spoon 1/2 cup chicken mixture onto pitas. Top with 2 slices of tomato; sprinkle with 2 tablespoons cheese. Serve with lettuce and sour cream on the side.