My mum's favourite; it has been in our kitchens for a long time. Neither she, nor I know where the recipe came from and it's only recently that I copied it from a yellowed piece of paper to my new, fancy recipe book. The yellowed copy is stored for a safe keeping.
To make it you will need:
250 g melted butter
small cup of milk (double espresso size)
7 g dry yeast
1 teaspoon salt
1 large egg
200 g of small feta cheese pieces
350 g plain flour
Dissolve the yeast in a small cup of milk and let it rise. Add it to the melted butter, combine and then add the rest of the ingredients. Knead it lightly and be careful not to overwork it and incorporate the cheese pieces. Refrigerate for at least two hours although it may be left in a fridge overnight.
Roll the dough until 1,5 cm high and cut the biscuits out, it doesn't matter what shape you give them.
Brush with egg yolk and sprinkle with sesame seeds if you wish.
Let them rise for 15 minutes and bake in preheated oven, 200 C until light brown.