Place the ciabatta on the grill and bake in the preheated oven (electric: 225 ° C/ gas: level 4) for 12-14 minutes. In the meantime, clean, wash and drain the rocket. Put some nice leaves aside and cut the remaining rocket into fine strips.
Wash the tomatoes, dab dry and quarter them. Peel onion and cut into large cubes. Peel garlic, press it through a garlic press and mix it with vinegar, salt and pepper. Finally, beat the oil into it.
Mix vinaigrette tomatoes, rocket and onions. Place rocket leaves and, if desired, some vegetable onion rings on a large plate and arrange the salad on top. Serve with the warm Italian bread.