Preheat oven to 350°F. Line bottom of 15X10-inch jelly-roll pan with waxed paper. Prepare cake mix according to package directions; pour evenly into prepared pan. Bake about 20 minutes or until cake is golden brown and springs back when lightly touched. Cool on wire rack 15 minutes.

Place clean kitchen towel on flat surface. Sift 1/4 cup powdered sugar over towel; invert cake on top of sugar. Carefully peel off waxed paper. Starting at short end, roll cake up with towel, jelly-roll style. Cool 30 minutes, seam side down, on wire rack.

Remove frozen yogurt from freezer to soften slightly. Carefully unroll cake. Place spoonfuls of frozen yogurt on top of cake; spread to edges. Reroll filled cake; cover tightly with plastic wrap. Freeze at least 3 hours or overnight.

To prepare strawberry sauce, combine strawberries, lemon juice and cornstarch in small saucepan; bring to a boil over medium heat. Reduce heat to low; cook and stir 2 to 3 minutes or until sauce has thickened. Let cool; refrigerate until ready to serve.

To complete recipe, remove cake from freezer 15 minutes before serving. Dust with remaining 2 tablespoons powdered sugar. Cut into slices with serrated knife; serve with strawberry sauce.