Vareniki

The only difference between pelmeni and vareniki is filling. Most popular fillings are berries with sugar. Take 3 parts of any berries you like, like raspberries, blueberries, and 1 part of sugar. Mix berries with sugar and add 1 tbsp per each piece of dough.
Use the same recipe for dough as I gave for pelmeni (ravioli with meat filling):

Dough – it’s the same as for ravioli:

All-purpose flour – 3 cups

Eggs – 3 large

Olive oil – 1 tbsp

Salt – 1 tsp

Water – 1/3 cup

Beat eggs, oil, salt, and water, add 3/4 of flour, knead (long time), wrap it in plastic and refrigerate for 30 min. To save time, I use Kitchen Aid mixer and dough hook and mix for at least 20 min on slow, then refrigerate for 30 min.