Green Pea Soup

Ingredients

• 3 tablespoons olive oil
• 1 large leek (white part only), finely chopped
• 1 brown onion, finely chopped
• 2 big cloves of garlic, finely chopped
• 4½ cups chicken or vegetable stock (reduced salt)
• 5 cups frozen peas
• Pepper
• 1 bunch dill or mint, finely chopped
• ½ cup natural yoghurt