Stir Fry Ginger Chicken

• 6 chicken breast filets
• 400 gr broccoli spears (chopped)
• 300 gr show peas
• 350 ml chicken broth
• 120 ml water chestnuts (sliced)
• 60 ml soy sauce
• 28 gr butter
• 16 gr cornstarch
• 3 gr garlic
• 1 gr ginger (ground)