In a mixing bowl, combine the wild-caught tuna, clean mayo, finely chopped onion, kosher salt, black pepper, paprika, and freshly squeezed lemon juice. Mash and mix for 2-3 minutes until creamy.

Wash and dry the cucumbers. Cut into thick slices, approximately ¼ inch each.

Spoon a generous dollop of the tuna mixture onto each cucumber slice, spreading it evenly.

Place the remaining cucumber slices on top to form a sandwich-like structure.

Secure each stack with a toothpick for serving.