From an old cookbook, Buchteln like grandma used to make, incredibly delicious!

Ingredients:

For the dough:
500g all-purpose flour
20g fresh yeast (or 1 packet of dry yeast)
100g sugar
100ml lukewarm milk
100ml lukewarm water
2 eggs
50g melted butter
1 teaspoon salt
Zest of 1 lemon (optional)
For the filling:
Apricot jam, plum jam, or your favorite fruit jam
For dusting:
Powdered sugar
Instructions: