Dough: mix the Flour with the chopped butter, add sour cream, egg and salt (half teaspoon). The bun put into the fridge for an hour.

Filling: Peel and mode onion half rings, fry under cover until Golden brown on the sink. the butter, add the corn, cheese and tuna. Separately mix the cream and eggs with your favorite spices I just salt and pepper. We mix it all together.

Roll out the dough and put into the form on parchment or greased. Spread the filling. Put into the oven at 180* for 35-40 minutes until Golden brown

Wait until slightly cooled and rush here )))