Cook the eggs hard-boiled (check the recipe).

Cut a slice of the peeled onion and finely chop it. Wash, dry, and halve the avocado. Sprinkle the half with the pit with lemon juice, wrap tightly in cling film, and refrigerate (use for another meal within a few days). Scoop out the flesh of the other half with a spoon. Peel the boiled eggs and cut them in half lengthwise. Remove the yolks.

Place the yolks, avocado, and onion in a blender container. Season with lemon juice, salt, and pepper to taste. Blend into a smooth, uniform mass.

Fill the egg whites with the prepared mixture. Sprinkle the stuffed eggs gently with smoked sweet paprika.