Slice bell peppers and onion. Add them to your sheet pan, toss with 1 ½ tablespoons olive oil and ½ teaspoon salt. Spread into an even layer.
Season chicken tenderloins with fajita seasoning and remaining 1 ½ tablespoons olive oil.
Lay chicken on top of the veggies and bake for 20-24 minutes, or until chicken has reached 165F. Once the chicken is done, shred it.
Cook the rice according to package instructions ( 1 cup of raw white rice yields about 3 cups of cooked rice). Fluff with a fork and stir in lime juice and cilantro.
Divide lettuce, rice, chicken and vegetables among bowls. Top with your desired amount of sour cream and smashed avocado.