Heat grill. Whisk together dressing ingredients in a small bowl.
Cut tuna into 1″ chunks and place on 2-3 skewers; brush lightly with olive oil.
Season lightly with salt and pepper. Grill skewered tuna until desired doneness; remove from grill.
In a large bowl, toss dressing with all vegetable ingredients.
To serve, divide salad on four individual plates; top with tuna.
4 servings
1