Boil the sliced potatoes in salted water till tender and boiled. Drain and drizzle with wine. Set aside for cooling.
Boil the eggs to your liking, for this salad I like them boiled till 8mins. Peel and set aisde.
In a seperate pan, boil haricot beans for 4-5 minutes till just done. Transfer to a ice bath so that they don't loose color.
To make the dressing - whisk the vinegar, shallot, mustard, thyme, salt, and pepper in a bowl. Whisk in the olive oil in a slow, steady stream until emulsified. You can also use a empty jam jar and shake it well for it to get emulsified
In seperate bowls, toss tomatoes, potatoes in the dressing. Mix very gently, specially the tomatoes so that they don't get squished.
To assemble the salad, Divide the lettuce among 4 plates. Next arrange the potatoes, beans, hard-cooked eggs, tomatoes and tuna on top in a circular fashion. Add the left over dressing back to the jar and drizzle on top of the salad. Place olives in the corner and serve.