Filling (Crema de zahar ars)

Preparation Time:  30 minutes
Cooking Time:  20-30 minutes

Ingredients

10 oz/300 g ground walnuts,
1 cup milk,
3/4 cup sugar,
1/4 cup rum,
vanilla


Melt the sugar in the warm milk with vanilla in a pot on the range. When the sugar is melted, add the walnuts and keep stirring. After a few minutes of boiling, and after the filling has thickened, remove from heat and add rum. When the filling is cold, roll a sheet of dough about one finger thick, uniformly spread the walnut filling on top and roll like a jelly roll.
Grease a bread pan, place the roll inside, let rise for a while. Wash with egg and bake at medium heat. Take out of the pan as soon as it is done, place on a cloth and let cool.