Stir-Fried Beef and Asparagus with Flat Rice Noodles

Ingredients

• Beef Marinade
• 1 garlic clove, minced
• 1 tablespoon oyster sauce
• 1 tablespoon soy sauce
• 1 teaspoon pure maple syrup
• Freshly ground black pepper, to taste
• 7 ounces (200g) ribeye, sirloin or rump steak, cut into ½ inch thick slices
• Noodles
• 6 ounces (160g) fresh or dry wide rice noodles
• 2 tablespoons vegetable oil
• 1 onion, sliced ¾ inch thick, divided
• 7 ounces (200g) asparagus, sliced lengthways into 4-inch pieces
• Scant ½ cup (100ml) water or broth, divided
• 2 tablespoons oyster sauce, divided
• 2 tablespoons soy sauce
• 3½ ounces (100g) bean sprouts