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Sunday, November 22, 2015
Sweet Potato Soufflé
2pounds sweet potatoes
1tablespoon unsalted butter
¼cup mild honey, such as clover
½teaspoon ground cinnamon
¼teaspoon freshly grated nutmeg
¼teaspoon ground ginger
¼cup plain low-fat yogurt
2teaspoons freshly squeezed lime juice
8egg whites, at room temperature
⅛teaspoon cream of tartar
Preheat the oven to 425ºF. Scrub the sweet potatoes and pierce in several places with a sharp knife. Line a baking sheet with foil and place the potatoes on top. Bake for 45 minutes to an hour, depending on the size of the potatoes, until thoroughly soft and beginning to ooze. Remove from the heat and let cool.
Adjust the rack to the lower third of the oven and turn the oven down to 400ºF. Rub the inside of a 2-quart soufflé dish or six 1- or 1 1/2-cup soufflé dishes with butter and dust with 2 tablespoons of the sugar, tilting the dish to coat evenly.
Peel the potatoes and puree in a food processor fitted with the steel blade. Add the honey, cinnamon, nutmeg, salt, ginger, yogurt, and lime juice and mix together well.
Begin beating the egg whites at medium speed in a standing mixer fitted with the whisk attachment or with an electric beater. When they begin to foam, add the cream of tartar. When soft peaks begin to form, slowly add the remaining tablespoon of sugar while beating and continue to beat until the egg whites form stiff but not dry peaks. Stir one fourth into the sweet potatoes, and gently fold in the remainder. Scrape into the soufflé dish (or dishes). Place on a baking sheet and bake a large soufflé for 20 to 25 minutes, small soufflés for 15 minutes, or until puffed and just beginning to brown. Serve at once. The soufflé should be runny on the inside.