Toss chicken with salt and pepper. In a large skillet, heat 1 tablespoon oil over medium-high heat; saute chicken until browned. Transfer to a 3-qt. slow cooker., In same skillet, heat remaining oil over medium heat; saute onion until tender. Add jalapeno, garlic, oregano and cumin; cook and stir 2 minutes. Add to slow cooker., In a bowl, mash 1 cup beans; stir in 1/2 cup broth. Stir bean mixture and the remaining whole beans and broth into chicken mixture., Cook, covered, on low until chicken is tender, 3-3-1/2 hours. Stir before serving. Sprinkle with cheese; add toppings if desired. Freeze option: Freeze cooled chili in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally and adding a little broth or water if necessary.