Matjes fillets of pickled cucumbers, apple, beetroot, onion and red bell pepper, clean / peel / dice. All ingredients (herring fillet cubes, cucumber cubes, apple cubes, beetroot cubes, onion cubes, red pepper cubes, 3 tbsp Tatarska omacka, 3 tbsp Greek yogurt, 6 tbsp cooking cream, 1 tsp light rice vinegar, 3 big pinches of coarse sea salt from the mill and 3 big pinches mixed pepper from the mill) in a bowl, mix well and refrigerate until ready to serve.