How to make
Break the 2 eggs in a bowl, beat well, add the cold water with 1 tablespoon of vinegar and the hartshorn and mix well with a whisk or spoon once again. Add the flour little by little, stirring nonstop.
The mixture will turn into a liquid, then finally pour in 5 tablespoons oil and the crushed feta cheese in. Put the mixture in a small greased and floured form. Preheat the oven to 390°F (200 °C), but when you put the form in reduce it to 300°F (150 °C).
Bake about 15-20 minutes in the oven from below and above. Cut it when it cools. This economical salty cake with feta cheese is a wonderful breakfast when combined with a glass of ayran.