Preheat your oven to 425°F (220°C). This high heat will help to caramelize the veggies and lock in the flavors of the chicken.
In a mixing bowl, combine the boneless chicken with red enchilada sauce, chopped chipotle peppers, dried oregano, ground cumin, and salt. Mix well to ensure the chicken is fully coated in the flavorful sauce.
While the chicken marinates, slice your bell peppers and yellow onion. These veggies will add color and crunch to your bowls.
Spread the marinated chicken evenly across one side of the sheet pan. Add the sliced bell peppers and onions to the other side, ensuring everything is laid out in a single layer for even cooking.
Place the sheet pan in the preheated oven and roast for about 25-30 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (74°C). The veggies should be tender and slightly caramelized.
While the chicken and veggies are roasting, prepare your rice according to package instructions. You can use any type of cooked rice—white, brown, or even cauliflower rice for a low-carb option.
Once everything is cooked, remove the sheet pan from the oven. Chop the chicken into bite-sized pieces and mix it with the roasted veggies. In individual serving bowls, layer the cooked rice, followed by the chicken and veggie mixture.
Top each bowl with shredded cheese, chopped avocados, jalapeños, fresh cilantro, and a squeeze of lime juice. Finish off with a dollop of yogurt or sour cream, and sprinkle with flaky salt to taste.