Toss chicken with salt and pepper. In a large cast-iron or other heavy skillet, heat 1 tablespoon oil over medium-high heat; saute chicken until browned, about 2 minutes. Remove from pan., In same pan, heat remaining oil over medium-high heat; saute rice until lightly browned, 1-2 minutes. Stir in beans, canned tomatoes, seasonings and broth; bring to a boil. Place chicken on top (do not stir into rice). Simmer, covered, until rice is tender and chicken is no longer pink, 20-25 minutes., Remove from heat; sprinkle with cheese. Let stand, covered, until cheese is melted. Top with tomato and green onions.