Halve the potatoes and arrange on a platter along with the crisp green beans and dressed tuna. Scatter over the olives and finely grate the eggs onto the salad. Season to taste and serve. Per serving: ...
Stir in both types of sesame seeds and the chilli flakes, if using. Divide the rice equally between four plates and top with the tuna salad. Garnish with coriander and serve.