Unfold the pastry sheet on a lightly floured surface and roll out until even.
Add the remaining ingredients to a medium bowl and stir to combine.
Spread the mixture on the prepared pastry sheet to 1/2 inch from the edge.
Starting at the long side, roll up like a jelly roll.
Refrigerate at least 30 minutes.
Preheat oven to 400º F.
Using a serrated knife (or string), cut the pastry crosswise into 18 (1/2-inch) slices. Place the slices, cut-side down, onto 2 baking sheets.
Bake for 15 - 20 minutes, until golden.
Cool on a wire rack for 10 minutes then serve with additional Hellmann's Spicy Mayonnaise, if desired.