Prepare sauce. Combine gochujang paste, soy sauce, honey, sesame oil, rice wine vinegar, and water in a bowl and whisk well.
Pound out the chicken to ¼-inch thick. Season with salt, pepper, ginger powder, garlic powder, and red pepper flakes. Cut chicken into 1 ½-inch pieces.
Next, add a tablespoon of canola oil to the wok and swirl to coat the bottom of the pan. Add the chicken, red onion, green onion, and red chilis to the wok. Stir fry for 5 minutes.
Pour in the sauce and toss to coat. Stir fry for 7 to 10 minutes.
Serve on a bed or white rice inside of butter lettuce. Garnish with sesame seeds and green onions if liked, and add any optional garnishes you wish.
Notes
Slice chicken evenly: This ensures it cooks quickly and consistently. Use high heat: A hot wok creates that classic stir-fry sear and flavor. Don’t overcook the sauce: Once thickened and glossy, it’s ready to serve. Taste the gochujang first: Heat levels vary, so adjust to your spice preference.