I made this in ramekins, rather than the phyllo cups. It was great.
1 cup mashed cooked sweet potato
3 tablespoons granulated sugar
1/4 teaspoon ground cinnamon
1/8 teaspoon salt
1/3 cup chopped toasted pecans
1/4 cup firmly packed brown sugar
1 tablespoon dark corn syrup
1/2 teaspoon vanilla extract
1 egg white
2 (2.1-ounce) packages mini phyllo shells (such as Athens)
Preheat oven to 350°.
Combine sweet potato, granulated sugar, cinnamon, and salt, stirring well.
Combine pecans, brown sugar, syrup, vanilla, and egg white, stirring well.
Spoon about 1 teaspoon sweet potato mixture into each phyllo shell, spreading to edges. Spoon about 1/2 teaspoon pecan mixture over sweet potato mixture. Place filled shells on an ungreased baking sheet. Bake at 350° for 20 minutes. Cool completely on a wire rack.
--Adapted from Cooking Light magazine