Rolled Sandwich

Preparation

1. Slice the onion into thin julienne strips and lightly sauté in a pan with a bit of oil or butter over medium heat for about 5 minutes, until soft.
2. If any other ingredient needs to be cooked for the filling, prepare it in advance until it reaches the desired doneness, before filling the sandwich.
3. Preheat the oven to 180ºC with heat from above and below.
4. Use a sharp knife to remove the crust from the slices of sandwich bread, ensuring they are the same size.
5. Overlap two slices of sandwich bread by approximately 2 or 3 cm to form a solid base.
6. Firmly press the overlap with the rolling pin to properly fuse the seam, ensuring the bread remains flat and compact.
7. Place the filling close to one of the long sides of the bread, leaving a margin of about 2 cm from the edge to facilitate rolling.
8. Carefully roll the sandwich over itself to form a cylinder, starting from the side with the filling.
9. Bake the sandwich in the preheated oven at 180ºC for 8 minutes, until it is slightly golden.
10. Turn the oven to the broiler function.
11. Finish the cooking with about 3 minutes under the broiler to achieve a golden and crispy surface finish.