Thinly slice the chicken to about ¼ to ⅛ inch thick (0.6 cm – 0.3 cm). In a large bowl, season with salt, garlic granules, onion granules, white pepper, and five-spice powder. Mix gently to coat evenly.
Coat with Starch:
Add 1 tbsp of tapioca starch at a time (up to 4 tbsp), mixing as you go. It’s fine if some slices stick together. Place the chicken in the fridge while you prepare the aromatics and sauce.
Prepare Aromatics and Sauce:
Slice the garlic, shallot, and ginger. Separate the white and green parts of the scallions. In a small bowl, combine the sauce ingredients.
Heat the Pan:
Preheat a large wok or sauté pan over medium heat until hot (check by holding your hand 2-3 inches/5-7 cm from the surface). Add 2 tbsp of avocado oil.
Pan-Fry the Chicken:
Cook the chicken in two batches over medium-high heat. Spread the slices in a single layer. Fry the first side without flipping for 3 minutes, then flip and cook the other side for 2 more minutes. The chicken should be golden brown with crispy edges. Set aside and keep warm. Add 1 more tbsp oil if needed for the second batch.
Stir-Fry Aromatics:
Using the same pan, heat 1 tbsp of oil over medium-high heat. Add the garlic, shallot, ginger, and scallion whites with two pinches of salt. Stir frequently for 1 minute to prevent burning.
Combine Chicken and Sauce:
Return the cooked chicken to the pan, add the scallion greens, and pour in the sauce. Toss everything together over high heat for 30 seconds.
Serve:
Turn off the heat and transfer the chicken to a large serving plate. Serve hot with steamed rice.
Notes
Adding Vegetables: Serve vegetables on the side to maintain the texture and flavor of the Mongolian chicken.
Mongolian sauce tastes savory with a hint of sweetness. To intensify the flavor, add a tablespoon of oyster sauce.
Chinese Dry Red Chilies: We use whole dried chilies, which means they aren’t cut open, so the heat stays mild. They mainly add a pop of red color and a hint of spice. Push them aside while eating, but if you enjoy a bit of heat, go ahead and eat them!
Spiciness Level: This dish isn’t inherently spicy. You can skip the dried chilies or Fresno chilies for a mild version. If you want a non-spicy option, substitute with red bell peppers.
Make-Ahead Tip: You can slice and marinate the chicken a day in advance or store it in a freezer bag for up to 1 month. If frozen, defrost overnight in the fridge with a tray underneath to catch any liquid.