Mix the quark, eggs and milk together, then add sugar, salt, flour with the baking powder and stir together too. Line a loaf tin with margarine and then sprinkle in a little breadcrumbs. Pour out the loose breadcrumbs. Now fill in the dough and smooth out and bake at 175 degrees for 1 hour. To prevent it from getting too brown, you can brush the mares with a little milk after half an hour. Let the mares cool for an hour before cutting them.