1Combine marinade ingredients (2 lbs boneless chicken thighs, 3 minced garlic cloves, 1 juiced orange, 1/2 C low sodium soy sauce, 1 tbsp rice wine vinegar, 1 tsp kosher salt, 1/4 C olive oil) in a bowl or ziploc bag; fully coat chicken; marinate in the refrigerator for 2-4 hours or at least 30 minutes.
2Grill chicken over medium heat for 12-15 minutes, flipping occasionally; alternatively, cook in air fryer at 400°F for 25 minutes or in the oven for about 30 minutes, flipping halfway through. Ensure the internal temperature reaches 170°F.
3Preheat skillet or saucepan over medium heat; sauté crushed peppercorns and garlic in olive oil until fragrant; reduce heat to low.
4Add remaining sauce ingredients (recipe not fully specified in video); simmer until thickened (a few minutes).
5Turn off heat; add orange zest and salt to taste; coat chicken in sauce; serve.