Break the eggs from the lower pan of boiling, lightly salted and acidified with a little vinegar water and cook until envelop (egg white turns white). Barn eggs can be prepared in a microwave oven - suitable for microwave container filled with water, sufficient to accommodate 4 eggs and the eggs and put in tap water. Prick yolks lightly with a toothpick, place the dish in a microwave oven, transfer the covered dish to the top, and cook until eggs are veiled. The feta cheese grated or crushed in a dish and top put veiled eggs (removed from the water with a slotted spoon). Pour in the melted, lightly fried butter.