In a medium bowl mix the chicken with the olive oil, taco spice mix.
Heat a grill, griddle or pan on medium-high heat, place chicken on grilled and cook for 5 minutes on each side or until cooked through. Remove from heat and set aside.
While the chicken is on the grill chop all of the veggies, and salad.
In a medium bowl make the burrito salad by mixing the tomatoes, pepper bell, onion, salt, pepper, 1 Tbsp olive oil and 1 tsp garlic powder. Toss well to combine.
To arrange the deconstructed burrito: divide the cooked brown rice equally between your bowls/containers, add chopped lettuce, burrito salad, sliced chicken, black beans and corn.