Cook the egg noodles according to package instructions.
Heat vegetable oil in a large skillet or wok over medium-high heat.
Add the diced chicken and stir-fry until browned and cooked through.
Add the minced garlic and ginger to the skillet, cooking for another minute.
Incorporate the diced bell peppers into the skillet and stir-fry for 2-3 minutes.
In a bowl, mix the soy sauce, rice vinegar, hoisin sauce, and Sichuan peppercorns.
Pour the sauce mixture into the skillet, stirring well to coat everything.
Add the cooked noodles to the skillet, tossing to combine.
Season with salt, pepper, and garnish with chopped green onions.
Serve hot, enjoying the delightful mix of textures and flavors.