Salmon and Tomato Chowder

Ingredients

• 1 196g skinless salmon fillet
• 1 bay leaf
• 1 1/4 cups fish or vegetable stock
• 2 1/2 cups low-fat (1%) milk
• 1 tbsp unsalted butter
• 1 tsp sunflower oil
• 1 large onion (finely chopped)
• 1 leek (chopped)
• 1 thick slice Canadian bacon (about 28 g, rind removed and chopped)
• 2 medium potatoes (peeled and diced)
• 1 large tomatoes (skinned, seeded and diced)
• 3 tbsp parsley (chopped)
• 4 tbsp nonfat sour cream
• salt and black pepper