Hard Boil the Eggs: Gently place the eggs in a large pot and cover them with cold water, ensuring there's about an inch of water above the eggs. Bring the water to a boil over medium-high heat. Once boiling, cover the pot with a lid, remove it from the heat, and let the eggs sit for 12 minutes. Afterward, transfer the eggs to an ice bath to cool completely.
Prepare the Filling: Once the eggs have cooled, carefully tap each egg on a hard surface and peel the shells under running water if needed. Slice each egg in half lengthwise and gently remove the yolks, placing them in a mixing bowl.
Make the Mixture: Using a fork, mash the egg yolks until crumbly. Then add the mayonnaise, Dijon mustard, white vinegar, salt, and pepper. Mix everything together until the mixture is smooth and creamy. Finally, fold in the finely chopped fresh spinach.
Pipe the Filling: Transfer the yolk mixture to a piping bag. Carefully pipe the creamy filling back into the hollowed egg whites, creating a generous mound.
Create the Christmas Trees: Arrange the filled egg halves on a festive serving platter in a triangular shape, mimicking the look of a Christmas tree.
Decorate: Place a mini cherry tomato half on top of each filled egg half to serve as a colorful ornament. Lightly sprinkle smoked paprika around the edges of the eggs. Use the small slices of bell pepper at the base of your egg display to create the trunk of your Christmas tree.
Serve: Chill the decorated eggs in the refrigerator for about 15 minutes to let them set before serving.
Notes
For an added festive flair, serve the deviled eggs on a bright green platter.