Salade Nicoise

0 Cook the potatoes in boiling salted water for 15 minutes or until tender. Drain, cut into cubes, and place in a bowl. Drizzle with the olive oil and toss well. 
3 Cook the string beans in boiling salted water for 3 minutes, then drain and refresh them under cold water. Drain well and keep aside.
1 To make the vinaigrette, whisk together the garlic, mustard, vinegar and lemon juice. Add the oil in a thin steady stream, whisking until smooth.
2 Put the tuna in a bowl and separate them into large chunks with a fork. Cover the bottom of a serving dish with the lettuce leaves. 
4 Scatter the potatoes, beans, tuna, tomatoes, olive and capers over the leaves, pour the vinaigrette over the top and decorate with the eggs and anchovies.