Preheat the oven to 356 degrees Fahrenheit.
Wash the bell peppers and cut them into four even pieces.
Place them on a baking sheet facing down, and roast them at 365 degrees for 15-20 minutes until they start to turn brown.
Remove them from the oven, and cover them completely airtight, either in a container or with foil. This helps to remove the skin easily.
After 5–10 minutes, start peeling the skins.
Move the peppers and all the ingredients to a blender or food processor.
Work them on medium power for a few minutes.
Let the sauce rest for a few hours.
This helps the process of blending the flavors.
It’s even better to leave it in the fridge overnight, strictly covered in an airtight container.