Tuna and egg salad

This is very simple to make, but satisfying enough for dinner for 2. It is a variant on a Nicoise salad, but does not have any potatoes in it.

Ingredients

For the salad

4 hard boiled eggs, sliced
1 Tin of tuna in oil, drained
Half a jar of black olives, pitted
Lots of rocket, enough to make a thick layer in the bowls before you put the other ingredients in
4 tomatoes, sliced

Optional ingredients for the salad: 

Capers, green olives, anchovies, toasted pine nuts

For the dressing

Olive or cold pressed rapeseed oil
Balsamic vinegar, good stuff is better as its flavour dominates this dressing. You don't need much
1 tsp english mustard
Salt and pepper

Instructions

Get a jar with a screw top lid on it. A clean jam jar is fine, but a screw top plastic food storage container is better. Pour in about 1 cm deep of oil. Add the mustard and salt and pepper. Pour in some balsamic vinegar. Less than half the quantity of oil should do the trick. Close the lid and give it a good hard shake.
Line the serving bowls with rocket. Arrange the other ingredients on top. Drizzle the dressing over.