Sweet Potato Soufflé

Ingredients (9)

• 1 pound sweet potatoes , about 2 cups cooked
• 6 tablespoons unsalted butter , softened
• 4 eggs
• 1 cup light brown sugar
• 1 cup half and half
• 1 teaspoon freshly grated nutmeg
• 1 teaspoon cinnamon
• 1 teaspoon cornstarch
• 1/2 teasoon kosher salt