Mushroom Miso Cornucopia

• 2 flaked seitan
• 2 brussel sprouts (fresh)
• 700 ml miso sauce
• 240 gr onions (finely diced)
• 170 gr button mushrooms (whole)
• 30 ml regular sesame oil
• 3 gr salt
• 2 gr tarragon leaves
• 1 gr black pepper (ground)