For the olive dressing
- STEP 1
First, make the dressing. Tip the olives, anchovies and garlic into a large mortar and mash with a pestle until you have a very rough paste. Scrape into a bowl, if you like, stir in the lemon juice, olive oil and vinegar, then set aside.
- STEP 2
Cook the potatoes in boiling water for 15 mins until tender, then drain and set aside. Cook the beans in boiling salted water for 4-5 mins until tender with a slight crunch. Drain, tip into iced water, then drain again and set aside. Boil a small pan of water and cook the eggs until cooked to your liking, about 6 mins for a soft yolk and 7½ mins for a harder yolk.
- STEP 3
Halve the potatoes and heat 2 tbsp oil in a non-stick frying pan. Place the potatoes cut-side down in the pan and sizzle for about 4 mins until golden and crisp. Toss the potatoes in the pan to brown on all sides, then turn up the heat and add the tomatoes. Fry the tomatoes for about 1 min until just starting to blister, then season. Splash in 1 tbsp of the balsamic vinegar, then turn off the heat and scatter over the basil.
- STEP 4
To cook the tuna, place a non-stick frying pan over a high heat, then turn the heat down to medium and add 1 tbsp oil. Season the tuna generously, then sear for 4 mins, leaving it undisturbed in the pan to brown. Turn over and continue to cook for 4 mins on the other side. This will give you very rare tuna. For rare, cook for 2 mins more on each side and for well done, add another 4 mins on each side. Set the tuna aside to rest for a few mins.
- STEP 5
To serve, whisk the remaining oil and vinegar with the lemon juice in a small bowl and toss in the lettuce wedges. Place a spoonful of olive dressing into 2 serving bowls, arrange the potatoes and tomatoes over, then put a pile of beans on top. Slice the tuna in half at a slight angle and place each half on top of the beans. Wedge the lettuce around the outside, halve the eggs and position in between the lettuce. Dollop a small spoonful of olive dressing on each egg.