Lean Kohlrabi Carrot Soup

from  Hurrythefoodup.com Ingredients: 3 carrots 1 kohlrabi 1 medium onion 100g low fat cream cheese (you could also use yogurt) 2 cups vegetable stock Knob of butter (Rob has upon researching discovered that a “knob” is roughly 2 or 3 tablespoons.) A small...