Curried Apple and Leek Soup

Details

Ingredients

• 1 tablespoon margarine
• 2 teaspoons curry powder
• 3 leeks, chopped
• ¾ cup diced potatoes
• 2 Granny Smith apples -- peeled, cored and chopped
• 3 cups vegetable broth
• salt and pepper to taste
• ¼ cup plain yogurt