Discard the tomatillos husks and wash them well. Cut the tomatillos to halves. Put them in a baking sheet and drizzle a bit of oil and salt. Bake in 400 degree oven for 25-30 minutes. Let them cool a bit.
Chop the garlic. Discard the jalapeno seeds and cut to medium pieces.
Put in a food processor the roasted tomatillos, garlic, jalapeno, cilantro, salt and pepper and process until you get a pretty smooth salsa.
Put in a bowl and mix in the lime juice and oil. Taste for salt.
(If you use it for the Chilaquiles and the salsa is pretty thick add water to thin it out a bit, so it will be more spreadable).