sweet potato coconut soup

Ingredients

• 2 tablespoons Vegetable oil
• 2 Onions chopped
• 2 ribs celery chopped
• 2 tablespoons gingerroot chopped
• 1 teaspoon mild curry paste or curry powder
• 6 cups sweet potatoes peeled and diced (about 2lbs)
• 2 apples peeled, cored and diced
• 5 cups chicken or vegetable stock
• 1 cup coconut milk
• 1/4 teaspoon Salt
• 1/4 teaspoon black pepper
• 1 tablespoon lime juice
• 2 tablespoons fresh coriander or green onions or parsley chopped