Preheat the oven to 180 C. White bread, ciabatta or baguette cut into cubes with a side of 2.5 cm, spread on a baking sheet and dry in the oven for 10-15 minutes until browned.
Mix in a small bowl: olive oil, red wine vinegar, lemon juice, finely chopped parsley leaves, finely chopped garlic, salt and crushed black peppercorns.
Cut vegetables: tomatoes and onions into 1 cm cubes.