Prepare your chicken by cutting the thighs into 1 inch chunks. In a large mixing bowl, combine the chicken pieces, salt, black pepper, garlic powder, coconut aminos, egg whites and cornstarch. Set aside and let the chicken marinate for 30 minutes.
While the chicken is marinating, prepare the sauce ingredients. In a mixing bowl, combine the coconut aminos, rice vinegar, sweet chili sauce and sriracha. In a separate bowl, prepare the cornstarch slurry by mixing the cornstarch with water. Mince the garlic.
Heat a generous layer of oil (about ½ cup) in a large skillet over medium-high heat, ensuring the bottom is fully coated.
Once the oil is hot, add the chicken pieces in a single layer and pan-fry for 4–5 minutes per side, until golden brown and cooked through. Avoid overcrowding the pan—work in batches if needed. Transfer the cooked chicken to a paper towel-lined plate or wire rack. Drain the excess oil from the skillet and wipe clean.
Heat the avocado oil in the skillet over medium-low heat and sauté the minced garlic for 1–2 minutes, until fragrant. Pour in the sweet chili sauce mixture and bring it to a gentle simmer. Stir in the cornstarch slurry, mixing continuously until the sauce thickens. Add the cooked chicken and toss until each piece is fully coated in the sticky, flavorful sauce.
Serve over white rice and your favorite stir-fry vegetables. Enjoy!