Mongolian Beef # 2

• 2 green onions
• 260 gr flank steak
• 60 ml chicken stock
• 30 ml hoisin sauce
• 30 ml peanut oil
• 18 gr garlic (chopped)
• 16 ml oyster sauce
• 16 ml wine
• 12 gr cornstarch
• 10 ml catsup