What is "vatrushka"?

Vatrushka is a traditional Russian pastry that is often enjoyed as a sweet treat or dessert. The pastry consists of a soft and fluffy dough that is filled with a sweet and creamy cheese filling made from quark, a type of fresh cheese. The cheese filling is often flavored with vanilla or lemon zest, and can be topped with a variety of toppings such as fruit jam or fresh berries. Vatrushka is typically baked until the dough is golden brown and crispy, and is often served warm with a dusting of powdered sugar. The pastry is a staple of Russian cuisine and is often enjoyed as a snack or dessert with tea or coffee.