Root Vegetable Soup

• 3 carrots (peeled)
• 3 turnips (peeled)
• 2 leeks only (white)
• 2 parsnips (peeled)
• 2 potatoes (red peeled)
• 2 hearts of bibb lettuce
• 2 fine chives (minced)
• 1 parsley (garnish)
• 1,400 ml homemade chicken stock
• 120 ml cream (heavy)