1small jar or can of tuna packed in oilabout 150-200g/5-7 oz
2-3heaping Tbs mayonnaisepreferably homemade
A pinch of capersrinsed and squeezed dry
4anchovy filletsor to taste
A few drops of fresh lemon juiceoptional
olive oil
saltto taste
Instructions
Split the hard boiled eggs lengthwise. Arrange the whites, cut side up, on a serving platter. Gingerly remove the yolks from the whites with a teaspoon, taking care not to break the whites.
Place the egg yolks, along with the tuna, capers, chopped anchovy fillets and 2 heaping tablespoons of mayo (plus a drizzle of olive oil if using store-bought mayo) in the bowl of a food processor. Process until you have a smooth and creamy paste. Add another spoonful of mayo if you feel it needs it. Add a few drops of lemon juice if you like, just enough to brighten the mixture without adding actual acidity.
Taste and adjust for seasoning.
Transfer the filling to a pastry bag with a large star-shaped tip, then pipe the filling into the hollow of the egg whites.
Serve your uova sode alla piemontese, garnished if you like with a caper, a bit of green olive, or minced parsley or chives.