Courgettes Stuffed with Cod Brandade - Terra Sacra

Ingredients

• 4-5 medium long courgettes or 6-8 round courgettes
• 400g of cod filet, cubed
• 3-4 medium potatoes, peeled, diced
• 3-4 shallots or 1 large onion, chopped
• 1 small leek, chopped
• 5-6 cloves of garlic
• 2 bay leaves
• 2 sprigs of thyme
• olive oil
• a glass of white wine
• water for boiling
• several tablespoons of organic butter (optional)
• salt and pepper to taste