Green Sauce with Avocado

Everyone who visits Veracruz encounters the famous picadas, which resemble thick tortillas with the edges pinched up like the shell of a tart to hold a light topping of salsa and grated cheese. They usually are brought to the table in both red and green versions, the former topped with a fresh salsa roja of roasted tomatoes and the latter with some cousin of this lovely tart sauce. Since discovering it, I’ve