For the beef with vegetables, cut meat into 1/2 cm thick, 4 cm long strips. Mix with sugar, soy sauce, rice wine, finely diced ginger and 1 tablespoon sesame oil and let rest for 2 hours.
Cut vegetables and chili peppers into fine strips, cut peeled garlic into sticks. Sauté chili and garlic in 2 tablespoons hot peanut oil in wok.
Add remaining vegetables, stir-fry about 2 minutes, then remove. Heat remaining peanut oil vigorously, remove meat from marinade and brown, turning in oil.
Mix with vegetables and drizzle with remaining sesame oil.