Fish pie with quinoa recipe

Ingredients

• 2/3 cup quinoa
• 1 1/3 cup water
• pinch sea salt
• 2 tablespoons olive oil
• 2 small leeks, washed, sliced
• 2 fennel bulbs, finely chopped
• 1/3 cup arrowroot powder
• 2 teaspoons hot english mustard powder
• 3 cups fish stock
• 1/2 cup chopped parsley
• 2 tablespoons lemon juice
• 20 smoked mussels
• 300 grams salmon fillet, skinned, cubed
• 300 grams ling cod fillet, cubed