Finely chop 2 radishes with the pickled ginger, then dress with the soy, 1 tablespoon of extra virgin olive oil and 2 teaspoons of water and put aside.Very finely slice the remaining radishes with their leaves.Place the beans in a non-stick frying pan on a high heat, cover with boiling kettle water, boil for 2 minutes, then drain. Return the pan to a medium-high heat.Rub the tuna with 1 teaspoon of olive oil and a pinch of sea salt and black pepper, then sear for 1½ minutes on each side, so it’s blushing in the middle.Divide the beans and radishes between your plates, half-tear the tuna and place proudly on top, then spoon over the pickled ginger mixture, drizzling all the juices around the plate.Finish with 1 teaspoon of extra virgin olive oil.