Preheat broiler. Cut poblanos in half lengthwise, and discard seeds and membranes. Place poblano halves, skin sides up, on a foil-lined baking sheet; flatten with hand. Broil for 10 minutes or until blackened. Place in a zip-top plastic bag, and seal. Let stand 10 minutes. Peel chiles and cut into 1/4-inch strips.
Place a medium nonstick skillet coated with cooking spray over medium-high heat until hot. Add chicken, tomato, and onion; sauté 5 minutes or until chicken is done. Stir in pepper.
Warm tortillas according to package directions. Spread about 1/4 cup Refried White Beans down center of each tortilla. Divide the chicken mixture, chiles, and cheese evenly among the tortillas, and roll up. Garnish enchiladas with cilantro sprigs, if desired.