Wash the cucumber thoroughly under cool running water to remove any dirt or residue. Pat it completely dry with a clean kitchen towel or paper towel. Using a dry cucumber helps the tuna mixture stay in place and prevents excess moisture from collecting on the serving plate.

Place the cucumber on a cutting board and slice it into rounds about ½ inch thick. Try to keep the slices uniform in size so they can hold the tuna filling evenly. Arrange the cucumber slices in a single layer on a large serving platter or plate, leaving a little space between each slice for easy assembly.

Open the can of tuna and pour off the liquid completely. Using a fork, gently press the tuna against the side of the can to remove as much excess moisture as possible. Properly drained tuna creates a thicker, creamier filling and prevents the cucumber bites from becoming watery.

Transfer the drained tuna to a medium mixing bowl. Use a fork to gently break apart any large chunks, creating a light and flaky texture while still maintaining some pieces for added bite and visual appeal.

Add the Greek yogurt, light mayonnaise, fresh lemon juice, finely chopped celery, Dijon mustard, garlic powder, salt, and black pepper to the bowl with the tuna. These ingredients create a creamy, flavorful filling while adding extra protein and freshness.

Stir everything together until the ingredients are evenly combined. Mix just enough to incorporate the seasonings and creamy ingredients without turning the tuna into a paste. A slightly chunky texture provides the best flavor and mouthfeel.

Taste the tuna mixture and adjust the seasoning if necessary. Add a little more salt for flavor, black pepper for a mild kick, or lemon juice for extra brightness. This small step ensures the filling is perfectly seasoned before assembling the bites.

Using a spoon, small cookie scoop, or tablespoon measure, place a generous mound of tuna mixture onto each cucumber slice. Aim for enough filling to create a satisfying bite while ensuring it stays securely on top of the cucumber.

Continue topping all of the cucumber rounds until the tuna mixture has been evenly distributed. If desired, use the back of a spoon to shape the filling neatly for a more polished presentation.

Sprinkle freshly chopped dill or parsley over the top of the tuna bites. The herbs add a burst of freshness, enhance the flavor, and make the finished platter look more vibrant and inviting.

For an extra-refreshing snack, place the assembled platter in the refrigerator for 5 to 10 minutes before serving. Chilling helps the flavors meld together and keeps the cucumber crisp and cool.

Serve immediately and enjoy these 22g Protein Tuna Cucumber Bites as a high-protein snack, healthy appetizer, quick lunch, meal-prep option, or post-workout bite. The combination of crunchy cucumber and creamy tuna filling makes every bite refreshing, satisfying, and packed with protein.