Freefrom Mushroom and Coconut Milk Soup

Ingredients

• 3 tbsp olive oil and 45g / 1½ oz goat butter – or 6 tbsp olive oil
• 6 small leeks, trimmed and sliced finely
• 350g / 12 oz chestnut mushrooms, chopped small
• 600ml / 20fl oz coconut milk
• 600ml / 20fl oz gluten/wheat-free vegetable stock
• sea salt and freshly ground black pepper
• juice 1–2 lemons
• 100g / 4 oz oyster or shitake mushrooms, sliced