Begin by mixing the sauce ingredients together: Combine the soy sauce, brown sugar, ginger, sherry, sriracha, cornstarch slurry, rice wine vinegar and garlic in a bowl.
Heat the peanut oil over high heat in a large skillet. Drop in the chiles and cook, stirring, for 30 seconds to release the heat. Add the chicken and fry until cooked through, 5 to 6 minutes. Remove the chicken from the skillet. Add the celery and red pepper and cook for 1 minute, then return the chicken to the skillet. Pour in the sauce mixture and cook until the sauce has thickened, a couple of minutes. Add the peanuts and toss together.
Serve over noodles and garnish with sliced green onions.
If the sauce becomes too thick, you can loosen it with a little water.