In a skillet, heat coconut oil on medium-high heat. Cook the onion and sliced chicken breast. The chicken should be cooked until it's no longer pink. Add two tablespoons taco seasoning, water, and corn. Simmer on low until water has evaporated.
Place cooked quinoa in a small sauté pan on medium heat. Lightly toss to toast and heat the quinoa through. Add the remaining tablespoon of taco seasoning and lime juice. Remove from heat.
Spoon quinoa into bowls. Top with chicken and corn mix. Garnish with cheese, cilantro, tomatoes, avocado, and sour cream.