1. Place the avocado slices on a large plate and mash them with a fork. (This method creates a consistency that is smooth yet texturally interesting.) Blend in the garlic, shallot, lemon juice, Worcestershire sauce, salt, and Tabasco. Mix in the chopped cilantro. Transfer to a bowl and lay a sheet of plastic wrap directly on the surface to retard browning. Refrigerate for 2 to 3 hours or until lightly chilled.