Boil the eggs for about 10 minutes in boiling water until hard, quench, let them cool down and peel them. Halve eggs lengthwise, remove egg yolks. Mash the egg yolks with a fork. Take 5 sprats out of the tin, drain and also crush them with a fork. Use the remaining sprats for other purposes. Wash the lemon, grate dry, cut in half and squeeze one half. Cut from the other half. Clean the rocket, wash and shake dry. Tomatoes wash, grate dry, halve, seed and cut into small cubes. Wash chives, shake dry and cut into pieces of about 4 cm
Stir egg yolks, sprats and mayonnaise until smooth. Season to taste with salt, pepper and lemon juice. Pour the sprat and egg cream into a piping bag with a perforated spout and squirt into the depressions in the egg white halves
Arrange rocket on plates, place eggs on top. Sprinkle with diced tomatoes and garnish with pieces of chives. Serve with lemon wedges