First, chop the chicken fillets into small, bite-sized cubes. Place them in a bowl and season generously with salt, black pepper, garlic powder, onion powder, and either chicken breast seasoning or paprika. Mix everything thoroughly to ensure each piece of chicken is evenly coated. Let the chicken marinate for a few minutes to absorb the flavors.
Next, thinly slice the large onion. Heat a bit of oil in a pan over medium heat and add the sliced onions. Season them well with a pinch of salt and pepper. Cook for about 7 to 10 minutes, stirring occasionally, until they become soft, sweet, and golden brown.
Once the onions are perfectly caramelized, remove them from the pan and set them aside. In the same pan, add the marinated chicken cubes. Cook the chicken, stirring occasionally, until it's fully cooked, golden, and slightly crispy on the edges.
Return the sautéed onions to the pan with the cooked chicken. Mix them together thoroughly so the flavors meld. Once combined, remove the mixture from the heat and set it aside while you prepare the guacamole.
Now it's time to prepare the fresh guacamole. Finely dice the cherry tomatoes and the small red onions. Cut the avocados in half, remove the pits, and scoop the flesh into a bowl. Mash the avocado gently with a fork, then stir in the diced tomatoes and red onions.
Finish the guacamole by squeezing the juice of one whole lime over the mixture. Add a pinch of salt to taste. Stir everything together gently until it's well combined. The lime juice will add a zesty kick and help keep the guacamole green and fresh.
Using the same pan you cooked the chicken in will add extra flavor. Place a tortilla wrap in the dry, hot pan and heat it for about 3 to 5 minutes on one side, or until it starts to get a little crispy and lightly browned.
Remove the warm tortilla from the pan. Spread a layer of the fresh guacamole on it, followed by a generous scoop of the chicken and onion mixture. Drizzle with garlic mayo, fold it in half, and your delicious chicken taco is ready to be enjoyed.