Step 1

Whisk the mayonnaise, cream cheese, salt and pepper together in a large bowl then stir in the lemon juice until smooth.

Step 2

Stir in the red onion and chives then stir in the tuna just until combined.

Step 3

Cover and refrigerate for at least 30 minutes.

Step 4

In the meantime, cut the ends off the cucumber then cut each one into thirds.

Step 5

Slice each third in half lengthwise then scoop out the seeds using a spoon.

Step 6

Turn them upside down on a paper towel to let any excess water drain out while the tuna chills.

Step 7

Fill the cucumber halves with 2-3 tablespoons of the tuna filling and serve immediately with a sprinkle of freshly chopped chives for garnish if desired.