Eight years ago, April Bloomfield moved to New York from London to open the Spotted Pig in the West Village. The success she found on this side of the pond may account for why today, she said, "I feel more American than British."

For her third Slow Food Fast contribution, Ms. Bloomfield shares a recipe for a nourishing root vegetable soup. The dish, which she created after hosting her first Thanksgiving, provided a way to give second life to leftovers from her produce-rich holiday spread.

At...