For the tomato and corn salad on arugula, wash the tomatoes, halve and slice. Drain the corn kernels. Peel the onion, halve it and cut it into strips.
Wash and dry the arugula and arrange it on a plate. Place the tomatoes, onion and corn kernels on top. Prepare a dressing from balsamic vinegar, olive oil, herb salt and pepper and pour over the salad.