Southwest Chicken Burritos

boneless skinless chicken breasts (pounded to ¾ inch thickness) + salt and pepper to taste

taco seasoning, divided

red pepper, chopped

small onion, chopped

black beans, drained and rinsed

yellow corn, drained and rinsed

cooked white or brown rice

packed cilantro leaves, roughly chopped

large burrito-sized flour tortillas

avocado, sliced

optional: salsa, sour cream, hot sauce, ranch dressing, fresh limes for squeezing