Peter's Cream Of Pumpkin Soup

• 2 celery stalks
• 1 onion (yellow peeled)
• 1 garlic clove
• 1 stalk thyme (fresh)
• 1/2 bay leaf
• 1,200 ml chicken broth
• 475 gr pumpkin
• 16 gr non-fat powdered milk
• 14 gr parsley
• 12 gr low fat cheese (white)