Chicken Phyllo Rolls (Tavuklu Börek)

For around 15 rolls

1 onion * 2 tablespoons olive oil * 1 cooked and shredded chicken breast * black pepper * salt * red pepper * dried thyme * 3 sheets of filo pastry (yufka) * 1 egg * 3 tablespoons yogurt * 125 g melted margarine

Garrison:

1 yolk

Heat the chopped onion with the oil. Add the chicken and seasonings and cook over low heat for about 10 minutes. Mix the yogurt with an egg and melted margarine. Lay the filo sheets on top of each other, brushing the surface of each one with the liquid mix. Cut equal squares and top each one with the chicken. Roll each one up, tucking the ends inwards. Place on a tray greased with oil. Bake in a preheated oven at around 200º until golden and crispy.