For the Charcoal Flakes:
Preheat the oven to 90°C or 194°F. Combine the bread, coriander, parsley and ink with enough water to form a very thin paste. Spread a thin layer of this mixture on a Silpat and dehydrate in the oven for 30 minutes. When it’s completely dry, break it with your hands to make little flakes.
For the Ashes:
Put the charcoal in a fire and burn until it produces white ashes. Strain them through a seive and reserve.
To Assemble and Serve:
Boil the potatoes in water until soft. Put the bell peppers directly onto a charcoal grill to char the skin; cut in half and reserve. Cook the asparagus on the charcoal grill. Put the Tepu wood into a bucket. Add the cinnamon sticks and rosemary stems. Cover with a small grill. Put the potatoes and asparagus on the grill and cover with the bell pepper flesh. Sprinkle with charcoal flakes and ashes to get the “burnt” look.