Preparation :

• Boil, peel, and mash the potatoes.
• Chop the onion and sauté in 1/2 small cup vegetable oil.
• Add mashed potatoes and salt to the onions, cook 1-2 minutes on low heat.
• Mix milk, vegetable oil, 1 egg, and 1 egg white in a large bowl.
• Place a yufka sheet and spread 5-6 tbsp of the milk mixture, fold and open to absorb.
• Cut into 4 parts, place potato mixture on the wide end, roll, and shape into a rose. Repeat with remaining sheets.
• Brush with egg yolk, optionally sprinkle with nigella seeds or sesame.
• Bake in a preheated oven at 180°C for 25 minutes.