Step 1: Prepare the Hard-Boiled Eggs

1. Place the eggs in a large pot and cover them with cold water. Bring the water to a boil over medium-high heat, then turn off the heat, cover, and let the eggs sit for 10–12 minutes.
2. Transfer the eggs to an ice bath to cool for 5 minutes before peeling. Carefully peel the eggs under running water to remove the shells cleanly.

Step 2: Slice and Remove Yolks

1. Slice each hard-boiled egg in half lengthwise.
2. Gently scoop out the yolks and place them in a mixing bowl. Arrange the egg white halves on a serving platter.

Step 3: Make the Filling

1. Mash the egg yolks and avocados in the mixing bowl until smooth and creamy.
2. Add the mayonnaise, Dijon mustard, lemon juice, garlic powder, onion powder, salt, and black pepper. Mix until fully combined. Adjust the seasoning to taste.

Step 4: Pipe the Christmas Tree Filling

1. Transfer the avocado yolk mixture to a piping bag fitted with a star or round tip.
2. Pipe the mixture onto each egg white half, starting with a wide base and swirling upwards to form a tree shape.

Step 5: Decorate the Christmas Trees

1. Sprinkle shredded Parmesan cheese or coconut flakes over the “trees” to resemble snow.
2. Place tiny red bell pepper squares onto the filling to mimic ornaments.
3. Add a small yellow bell pepper star to the top of each tree for the finishing touch.
4. If desired, garnish the platter with fresh herbs for an extra festive look.