In the warm milk dissolve yeast with 1 tsp sugar and 1 tsp salt. Add the eggs, the feta cheese, crumbled, and flour. Stirring with a wooden spoon. Oilte your hands thoroughly with melted butter and make balls as walnut. In a greased pan average size stack marbles and leave to rise. Bake in moderate oven until it turns rosy. Before putting them in the oven, you can sprinkle them with breadcrumbs, paprika, cumin and savory optional.