Huevos duros rellenos (stuffed hard-boiled eggs)

Instructions

1. Place the eggs in a pan of cold water, bring to the boil, then cook for 10 minutes. Cool them immediately under cold water, then peel.
2. Cut each egg in half lengthwise. Carefully remove the yolks and set the whites aside on a dish.
3. Mash the yolks with a fork together with the tuna, mayonnaise and mustard until smooth. Season with salt and pepper.
4. Finely chop the gherkin and parsley, then mix them into the filling with half the olives, sliced into rounds.
5. Fill each half white with a generous spoonful of filling, shaping it into a dome. Garnish with a whole olive and a pinch of paprika.
6. Chill for 30 minutes before serving so the filling firms up.