3 cheese and onion pastries borek Recipes

onion, thinly sliced, extra virgin olive oil, potatoes, boiled and mashed, salt & freshly ground black pepper, crumbled feta cheese (optional), puff pastry, preferably fresh , but frozen if necessary, egg yolk, beaten with, water, sesame seeds, eggs, vegetable oil, salt, pepper, vegetable peels (dried onion peels specifically), ground coffee (optional) or 1 -2 tbsp instant coffee (optional)

beef mince, onion, chopped, cinnamon, parsley, finely chopped, eggs, beaten (optional), phyllo pastry sheets (feuille de brick sheets), laughing cow cheese (optional), vegetable oil