1 Make the sauce: whisk the yolk, juice of 1/4 lemon, anchovies, garlic and mustard in a blender. In the process of whisking, add olive oil in a thin stream.
2 Add the sauce to the salad mix and mix.
3 Cut cherry tomatoes in half, break mackerel into large pieces. Grate cheese with a vegetable peeler on large plates.
4 Put the seasoned lettuce leaves on a plate, put the mackerel and cherry tomatoes on top, then carefully top it up with cheese.