Stir hoisin, soy sauce, white vinegar, ginger and pepper in a small dish.
Heat oil in a wok or large skillet over high heat. Add peppers, onion and garlic and cook, stirring until the vegetables start to soften, 3 to 5 minutes. Scrape the pepper mixture out onto a plate and keep warm.
Add pork to the wok or skillet and cook, breaking up until the pork is no longer pink, 5 to 7 minutes. Add edamame, the vegetable mixture and the sauce and cook, stirring until heated through, about 2 minutes more. Serve topped with nuts.
