Light Codfish Lasagne - Riberalves

Ingredients

• 250 g deep-frozen soaked codfish Riberalves
• 4 very large courgettes
• 2 leeks
• 250 g of mushrooms
• 1 kg of ripe tomato
• 4 cloves of garlic
• 4 tablespoons of olive oil
• 1 tablespoon of butter
• 1 tablespoon of flour
• 1 tablespoon chopped chives
• salt, q. B.
• 1 lemon
• Grated Parmesan cheese