Heat oil in a small skillet. Add onion and carrot, and sauté for 5 to 8 minutes. Add chicken broth, and bring to a boil.
Dissolve potato starch in water in 1 tablespoon water; add to boiling broth. Stir until thickened. Season with salt to taste, and pepper if using.
As seen in Joy of Kosher with Jamie Geller Magazine Pesach 2012 - Subscribe Now