Codfish brandade in the oven with tomato - Riberalves

Ingredients

• 800 g deep-frozen soaked cod fillets Traditional Riberalves
• 800 g of potatoes
• 2 ripe tomatoes
• 1 onion
• 3 cloves garlic
• 1.5 dl of olive oil
• 2 dl of cream
• 2 gems
• 80 g grated cheese
• chopped parsley q.b.
• Salt and pepper q.b.
• margarine to grease