Place the bell peppers inside a casserole or oven tray. Bake them for forty to fifty minutes until you get a soft crust on the surface.
Transfer the peppers to a capient jar, close the lid, and let rest for about thirty minutes.
Meanwhile, bring a big pot of salted water to a boil - about two liters (half a gallon) and one tablespoon of salt.
Discard the bell pepper stems and seeds and peel them - the skin should come away easily.
Return the pulp to the jar, add the garlic clove - peeled - the basil, and the salt.
Use an immersion blender to get an amalgamated cream.
Cook the pasta according to package directions.
Drain it, season it with the bell pepper creamy sauce, garnish it with a few more chopped basil leaves and sprinkle, if you like, with grated Parmesan or Pecorino cheese.