Preheat oven to 425°. Brown chicken in a large skillet over medium heat, stirring often, 7 minutes or until chicken is no longer pink. Add onion and bell pepper, and sauté 3 minutes or until vegetables are tender. Drain. Stir in beans, tomatoes, cilantro, and salt.
Pour chicken mixture into a lightly greased 13- x 9-inch baking dish. Sprinkle with 1 1/2 cups cheese. Stir together buttermilk and cornmeal mix, and spoon over cheese; sprinkle with remaining 1/2 cup cheese.
Bake at 425° for 25 to 30 minutes or until browned.
Good! I modified, used chili pepper paste (didn't have bell peppers) and leftover rotisserie chicken, and Jiffy corn muffin mix. It came out really well and was a fun easy to use up the leftover chicken. I served it with green salad. I didn't need the full 25 minutes though it was ready in about 20.