Mix the flour with baking powder, sift and add to the liquid part.
Knead a not very steep dough. Transfer to a container, cover with plastic wrap and refrigerate for 2 hours.
Roll out the dough into a circle.
Divide with a knife into 8 segments.
For the filling, prepare apple-pear jam and halva (I have chocolate). Mash the halva with a fork, adding either a little jam, or 50 g of butter, so that the mass becomes homogeneous.
Place the filling on the wide part of each segment.
Roll the roll to the narrow end. You can roll each croissant in sugar.
Place the croissants on a baking sheet lined with baking paper. Let rise for about 15 minutes.
Bake at 180 degrees for about 20 minutes until golden brown.