In a serving bowl, toss together the cucumber, grapes and the chopped mint. Set aside.
In a small bowl take all the ingredients for the salad dressing and whisk them together. Season to taste and set aside.
Heat the olive oil in a large nonstick frying pan and cook the halloumi, turning occasionally, until golden all over. Remove and allow to cool a little.
To serve, add the halloumi to the salad ingredients, spoon over the dressing and scatter with the