Cook rice according to package instructions, cooking 5 minutes less than the specified time on package.
Cut chicken thighs or breasts into bite-sized pieces. Sauté chicken pieces with cubed onion and butter until chicken is fully cooked, stirring as needed. Lightly season with salt and pepper.
In a small bowl, combine sour cream, chicken soup, chicken broth, salt and pepper. Mix.
Add the cooked rice, chicken pieces, soup mixture, broccoli florets, tomatoes, red pepper and 1/3 of the grated cheese to a 9”x13” casserole dish. Mix well to combine. Add remaining cheese over top of casserole. Sprinkle bread crumbs over cheese (or crushed crackers).
Cover casserole dish with foil, bake 20 minutes. Remove foil, bake another 15-20 minutes until ingredients bubble and cheese melts and is golden in color. Enjoy!