Start by placing the cubed chicken thighs in a large mixing bowl. Add 1 tablespoon of vegetable oil, garlic powder, salt, and black pepper to taste. Mix everything well until the chicken is evenly coated. Then, dust the chicken pieces with cornstarch and toss again to form a light, even layer that will help them crisp up while cooking.
Heat your wok or skillet over medium-high heat and add the vegetable oil. Once it’s hot and shimmering, place the chicken in the pan in batches. Avoid overcrowding, as this will help the chicken cook evenly and become crispy. Turn each piece frequently until it’s golden brown and cooked through. Remove the chicken and set it aside on a plate.
In the same pan, add a little more oil if needed and toss in the sliced bell peppers. Stir-fry them until they begin to soften and get a slight char. Add the minced garlic and optional ginger, and stir just until fragrant. This builds a flavorful base for your stir fry sauce to cling to.
Return the crispy chicken to the skillet, followed by the steamed green beans. Pour in the sweet chili sauce, a dash of sesame oil, and sprinkle in the crushed red pepper flakes. Stir everything gently but thoroughly so that all the ingredients are evenly coated. Let it simmer for 2–3 minutes, allowing the sauce to thicken and coat the chicken and veggies.
Serve your Chicken and Green Bean Stir Fry hot over a bed of steamed white or jasmine rice. You can also enjoy it on its own for a lighter, low-carb option. Sprinkle with sesame seeds or chopped green onions for a final touch if desired.