Preparation :

• In a mixing bowl, combine warm water, milk, dry yeast, and sugar. Stir well.
• Let the mixture rest for 15 minutes to activate the yeast. Then add vegetable oil, egg white, and salt, and mix.
• Gradually add flour and knead the dough. Cover and let it rest at room temperature for 1 hour.
• Divide the dough into small pieces for sandwich-sized rolls, shape them, and place on a baking tray.
• Let the dough rise again for 15 minutes at room temperature.
• Before baking, brush the tops with egg yolk. Optionally, sprinkle with nigella seeds or sesame seeds.
• Bake in a preheated oven at 180°C (356°F) for 25 minutes.