Prep the ingredients per the instructions above.
Make the guacamole: Scoop out the flesh of the avocado and mash it in a bowl with a fork. Add diced tomatoes, chopped cilantro, lime juice, garlic powder, salt, and pepper. Mix well until all ingredients are combined and the guacamole reaches your desired consistency. Refrigerate in a sealed container until ready to serve.
Heat the oil in a skillet or non-stick pan over medium heat. Add the onions and peppers, and season with salt and pepper. Sauté until onions are translucent and peppers are tender.
Add in the chicken, garlic powder, cumin, and paprika, and season with salt and pepper. Sauté until the chicken is nicely browned and fully cooked to an internal temperature of 160°F (71°C) using a thermometer.
Heat a nonstick pan over medium heat. Warm the taco shells on both sides.
Stir together all ingredients for the mocktail until well combined. Taste and adjust the lime or honey as needed. Serve over ice if desired.
Serve the fajita with soft taco shells, sour cream optional, chips and guacamole, and mocktail.