Bulgarian Butter and Feta Banitsa

Method

1. In a large bowl, mix flour and salt.
2. Cut cold butter into small cubes and work it into the flour with your fingers until the mixture resembles coarse sand.
3. In a separate bowl, mix feta cheese, sour cream, and egg until smooth.
4. Divide the dough into two equal parts. Roll out one part into a rectangle and spread the cheese mixture over it.
5. Roll the dough tightly, then cut into individual portions and place on a baking sheet.
6. Brush with a little beaten egg and bake at 200°C (390°F) for 25-30 minutes until golden brown.