- On baking day, take a 1 1/2 pound dough piece (small cantaloupe-size, 1/3 of refrigerated dough recipe from above) from the bucket. Put remaining dough back in refrigerator. 
- Using plenty of flour, roll out the dough into a 1/4-inch-thick oval. Form the 1/2 cup almond paste into a rope and lay it onto the dough about a 1/3 of the way from the end. 
- Fold the dough over the almond paste in thirds, so that it forms an S-shape, when you look at it from the end. 
- Place the loaf on a sheet pan with parchment or a nonstick silicone baking mat and loosely cover with plastic and let it rest for 90 minutes. 
- Preheat oven to 350°F, with rack in the middle of the oven. 
- Using a pastry brush, cover risen dough lightly with egg wash. Bake for 35 to 40 minutes. 
- Cool on wire rack for about 20 minutes. 
- Sift confections' sugar over top until it is completely covered.