White Chicken Chili Casserole

Heat oil in a large skillet over medium heat. Add onion and poblanos; cook, stirring, until starting to soften, about 3 minutes. Add jalapeño and garlic; cook, stirring, for 1 minute. Add chicken, cumin, oregano, salt and pepper; cook, stirring, until the chicken is opaque on all sides, about 3 more minutes. Stir in broth and beans and bring to a lively simmer. Reduce heat to maintain the simmer and cook, stirring a few times, until the chicken is cooked through and the broth has reduced, about 10 minutes. Remove from heat and stir in sour cream. Serve topped with cheese, tortilla chips, onion and/or cilantro, if desired.