Deseed and thinly slice bell peppers and peel and thinly slice the red onion. Then add to a large baking sheet and drizzle with a little oil and season with sea salt and work oil and salt into the vegetables with your hands.
Mix cumin, red pepper flakes, and sea salt and pepper to taste and then rub onto the chicken.
Add seasoned chicken to the baking sheet with the vegetables and place in the oven for 15-18 minutes or until the chicken reaches an internal temperature of 165F.
Divide rice, chicken, and vegetables among 4 meal prep containers, drizzle with fresh lime juice, and sprinkle with freshly chopped cilantro.