Creamy Tomato and Crab Soup

Ingredients

• 1 tbsp reduced-salt margarine
• 2 tbsp extra virgin olive oil
• 1 large onion (finely chopped)
• 400 g potatoes (peeled and finely diced)
• 350 g ripe tomatoes (skinned, seeded and diced)
• 2 anchovy filets (drained and chopped)
• 2 1/3 cup fish stock (preferably reduced-salt)
• 3/4 cup dry white wine
• 1 tbsp tomato paste
• 200 g fresh crab meat (ready-prepared)
• 2/3 cup low-fat milk
• 4 tbsp reduced-fat sour cream (to garnish)
• 2 anchovy filets (drained and cut into thin strips, to garnish)
• paprika (to garnish)
• pepper (to taste)