Heat oil in a soup pot. Add the carrot & onion. Cover & saute for 10 minutes, without browning. Shake the pot occasionally. Add the orange zest & orange juice, stock, cilantro & the rest of the seasonings. Bring to a boil, cover & simmer for 45 minutes. Set aside to cool slightly. Pour soup into a blender & puree until smooth. Return to pan & re-heat. Serve hot. Elizabeth Brand, "Vegetables"