For the appetizers potpourri prepare the deviled eggs. Hard boil the eggs, peel them, cut them in half and take out the yolk.
In a bowl, mix the softened butter, stir in the mashed egg yolks, mayonnaise, mustard and salt and fill this mixture into the egg halves and sprinkle with chives.
For the mustard sauce, stir the mustard with the oil and the powdered sugar for a long time. Season with vinegar and stir in the dill.
Arrange the salmon with the mustard sauce on a plate and garnish with lemon wedges, add sliced mozzarella with the cocktail tomatoes and complete with a stuffed egg.