Slice the cooled hard-boiled eggs in half lengthwise. Remove the yolks and place them in a mixing bowl.
Mash the yolks with a fork. Stir in the mayonnaise, Dijon mustard, jalapeño juice, salt, and pepper until well combined. Taste and adjust the seasoning as needed.
Spoon or pipe the filling into each egg white half.
Top each deviled egg with a jalapeño slice and sprinkle with paprika.
Keep chilled until ready to serve and enjoy.
Notes
Refrigerate the leftovers, covered, for up to 2 days.