PREPARATION OF THE DOUGH:

1. Mix all the ingredients until you get a soft and elastic dough.
2. Let it rest for 30 minutes at room temperature to achieve the desired consistency.
3. Roll the dough out to obtain a large, rectangular extension, it can be about 40 cm (16 in) long by about 30 cm (12 in) wide
4. Preheat the oven to 350°F (180°C)

PREPARATION OF THE FILLING:

1. Melt half of the butter in a frying pan and place the breadcrumbs together with the sugar and cinnamon.
2. Meanwhile, brush a little bit of oil or butter over the extended dough.
3. Then add the bread mix.
4. Over this, place the finely-sliced apples, raisins and chopped walnuts.
5. Sprinkle with granulated sugar and top with the remaining butter bits.
6. Form a roll and place it over the previously-buttered oven tray (the roll closure should face down).
7. Brush on the outside of the dough with a beaten yolk mixed with a little milk.
8. Bake for 40 to 50 minutes.
9. Once ready, sprinkle with powdered sugar.