Irish Seitan Stew

• 2 seitan (diced)
• 2 bay leaves
• 475 ml water
• 150 gr potatoes (peeled)
• 130 gr parsnips roll (cut)
• 130 gr carrots roll (cut)
• 120 gr onion (diced)
• 60 ml water (cold)
• 50 gr celery flaked
• 32 gr cornstarch