Spray with a small amount of low-fat spray and add a small amount of water. Microwave until the pumpkin is soft.
Skin is optional.
Chop the red onion and leek finely and place in a microwave container. Spray with low-fat spray adding the garlic and pepper. Microwave until soft. Slowly add the chicken stock, combining until you have the desired thickness of the soup. If you run out of chicken stock you can add a small amount of water to the mixture.