Cut the mozzarella block into 30 bars; Season them with salt and pepper. Pass them through the flour, shake them, then get them through the beaten proteins and, finally, through the breadcrumbs. Let it rest at least 1 hour in the fridge.
Grate the cucumber with the coarse grid of the grater, season with salt and drain in a sieve for 20 minutes. Squeeze it a little and add the yogurt, along with a good half of the chopped dill, the pressed garlic cloves, salt and pepper cloves.
Bake the croquettes golden brown in the frying pan, at 180 ° C. Drain them on kitchen paper.
Divide the tzatziki over glasses, add the croquettes, finish with dill and serve.