Hydrate the ñoras the day prior by soaking them in water, then remove the stem and seeds. Alternatively, boil the peppers for 15 minutes; it isn't quite the same, but it works!
Dry the bread out a few hours in advance if possible, then toast until golden brown. Let cool, remove the crusts, and cut into smaller cubes.
Cut a few small slits in the plum tomatoes and drizzle them with olive oil. Roast them and the garlic at 400°F (200°C) for about 35 minutes.
Roast the nuts on a baking sheet until golden, about 5 minutes, moving them around every couple of minutes. Watch them closely!
Let everything cool down, then blend all the ingredients together in a blender until uniform, but not puréed. Add more vinegar, salt, and cayenne to taste.
Enjoy the sauce with roasted vegetables, or on a sandwich.