Fry the leeks in vegetable oil until golden brown.
Boil the chicken fillet in boiling water for 4 minutes. Cut into small pieces.
Beat the eggs with salt, pepper and oregano. Grease the molds with oil and add a little beaten eggs to each. Then add the filling: leek, spinach and chicken fillet. Place in the oven preheated to 180 °C for 20-25 minutes.