To prepare the marinade, pour the lime-juice, olive-oil and water into a large resealable bag. Add the sugar, garlic, salt, smoked paprika, cumin, onion-powder and chili-powder.
Seal bag and shake to blend. Add the chicken to the bag of paper, seal and put in refrigerator (marinate a min of 30minutes or up to 8hours).
Preheat a grill, grill pan or skillet over medium heat. Add the chicken & cook for 5-6minutes on each side until cooked through.
Chop the cooked chicken into bite sized bits. Set the rice or quinoa in a large bowl then add the cilantro, lime-juice, pepper and salt to taste. Toss to coat the rice equally.
Divide the rice between 4 bowls. Arrange the chicken, avocado, salsa, beans, sour-cream & lettuce in addition to the rice. Serve immediately.