1. Combine flour, butter, cream cheese, egg yolk, salt and pepper. Chill.
2. Roll out and cut into 2� squares.
3. Spread a tsp. of filling on each square, pull corners together and seal.
4. Place on an ungreased baking tray.
5. Bake at 200°C for 12-15 mins. till golden brown.

For the Filling:
Combine chicken, onion, celery, chopped olives, salt, pepper and mustard. Moisten with mayonnaise.

Note: For a vegetarian version, use crumbled paneer instead of chicken and 1 tbsp. chopped capsicum.