Start by cutting your chicken thighs into bite-sized pieces. Make sure to cut against the grain to prevent chewy chicken.
In a bowl, mix the cornstarch and salt.
Coat the chicken pieces with the cornstarch and salt mixture, ensuring each piece is evenly coated.
In a large skillet or wok, heat a generous amount of oil over high heat.
Fry the chicken pieces in batches, ensuring they don’t overcrowd the pan. Cook until golden brown and crispy, then transfer to a rack to drain excess oil.
In a separate bowl, mix grated ginger, hoisin sauce, soy sauce, dark soy sauce, sugar, and sesame oil. Stir until well combined.
In the same skillet, saute garlic until golden brown.
Add the sauce mixture and bring it to a simmer over medium heat. Allow it to cook for a few minutes.
Add the chicken back into the skillet with the sauce. Toss until the chicken is well coated in the sauce.
Add the slurry and stir continuously until the sauce reaches your desired thickness.
Turn off the heat and add Fresno chilies. The residual heat will gently cook the chilies, adding a nice flavor and slight heat to the dish.
Garnish with chopped green onion and a sprinkle of sesame seeds.