Peel the hard-boiled eggs, slice them in half, and gently remove the yolks into a small mixing bowl. Set the egg white halves on a platter.
Mash the yolks with a fork until smooth.
Add mayonnaise, mustard, vinegar, salt, and pepper. Stir well until creamy.
(Optional) For a pumpkin-like color, mix in a drop of red food coloring.
Spoon or pipe the yolk mixture into a piping bag fitted with your favorite tip.
Pipe the filling into each egg white half, shaping it into a small round “pumpkin.”
Use a toothpick to gently draw curved lines to create pumpkin ridges.
Cut fresh chives into small pieces (¼ to ½ inch) and place one piece on top of each egg as a stem.
Lightly sprinkle paprika over the tops for a finished look.
Chill the deviled eggs in an airtight container in the refrigerator until ready to serve.
