Add a little vegetable oil to the wok, fry garlic, onions and ginger. Stir fry until the vegetables have softened, then add peppers and chillies. Cook, stirring until the vegetables have softened, then add beef, along with the sauces. Stir fry on high heat until the beef is cooked through, add asparagus, spring onions, dried chillies, and peanuts. Stir to combine. Taste and adjust the seasoning. It should be spicy, sweet and sour. Serve with rice.