Cut chicken into 1-inch pieces. Marinate with 1 tbsp olive oil, 2 tbsp taco seasoning, 1 lime juice, and garlic for 30 min. Cook in a skillet until golden or bake at 400°F for 18-25 min.
Rinse rice, then cook with water and salt until tender, about 15 min. Fluff and stir in lime juice and cilantro.
Sauté diced onion in olive oil, add garlic, cumin, chili powder, then stir in black beans with water. Simmer 5-7 min, season to taste.
Mix corn with diced onion, jalapeño, cilantro, and lime juice. Toss gently.
Assemble bowls with rice, chicken, beans, and corn. Top with avocado, sour cream, cheese, salsa, lettuce, and lime. Serve immediately.
Notes
For extra flavor, marinate chicken longer or add your favorite toppings.