Cut the hand cheese into 2 by 2 cm cubes. Peel the 2 garlic cloves and press through a garlic press. Cut the red onion into rings. Wash the basil leaves, pat dry, and cut into strips. Cut the sun-dried tomatoes into strips.
In a bowl, combine the olive oil, white wine vinegar, pressed garlic, onion rings, pitted black olives, basil strips, sun-dried tomato strips, and dried oregano. Season well with salt and white pepper.
Add the cheese cubes to the marinade, stir well, cover, and refrigerate for at least 24 hours.
Wash and dry the arugula. Quarter or halve the cocktail tomatoes and mix with the arugula.
Lightly dress the salad with olive oil, season with salt and white pepper, and arrange on plates.
Remove the marinated cheese from the refrigerator, stir well, and serve on top of the salad.