Cream of vegetable soup

Ingredients

• 1 chopped onion
• 1 leek, chopped
• 1/2 red bell pepper, chopped
• 1/2 green bell pepper, chopped
• 1 chopped zucchini (without skin)
• 2 chopped potatoes (without skin)
• 2 carrots, chopped
• 1 celery stalk, chopped
• 500 ml. of hot chicken broth
• Salt and pepper to taste
• Olive oil