Prepare the Marinade: In a small mixing bowl, combine the chipotle sauce, ranch seasoning, olive oil, and a pinch of salt and pepper. Stir until well mixed to create a smooth marinade.
Marinate the Chicken: Place the chicken breasts in a resealable plastic bag or a shallow dish. Pour the marinade over the chicken, then seal the bag or cover the dish. Make sure the chicken is evenly coated by gently massaging the marinade in. Let it marinate for at least 30 minutes, but for best results, refrigerate for up to 2 hours.
Grill the Chicken: Preheat your grill to medium-high heat. Remove the chicken from the marinade, discarding any excess. Grill the chicken for approximately 6-7 minutes on each side, or until it reaches an internal temperature of 165°F (75°C).
Slice the Chicken: Once grilled to perfection, remove the chicken from the heat and let it rest for about 5 minutes. Then, thinly slice the chicken breasts into strips.
Assemble the Burritos: On a clean, flat surface, lay one tortilla. Start layering by adding a scoop of cooked brown rice, followed by a portion of black beans and corn. Top with grilled chicken strips, a sprinkle of shredded cheddar cheese, a handful of chopped romaine lettuce, and slices of avocado.
Roll the Burrito: Fold in the sides of the tortilla and carefully roll it up from the bottom, making sure all the filling is tucked in securely. Repeat this process with the remaining tortillas and ingredients.
Optional Grilling: For an extra crispy texture, you can grill the assembled burritos on the grill for an additional 1-2 minutes on each side until the tortillas are golden brown.
Serve: Plate the warm burritos and garnish with fresh cilantro if desired. Serve alongside lime wedges for an extra splash of flavor.
Notes
For extra flavor, grill the assembled burritos for a crispy texture.