Recently reincarnated as a pop-up inside Specters, Rastaco is the bare bones. They do tacos, shots of Patron Silver (30rmb), Dos Equis (20rmb), reggae jams on the stereo (Toots and the Maytals et. al), and that's it. The menu is 8 varieties of taco, cooked by the order on the spot, for 20rmb each. It comes from that hip, boutique-style six-inch flour tortilla taco terrain and takes a spin through Chinese flavor land -- Mongolia Lamb (might be the best one), Soft Boiled Egg, Tuna, Cheese -- along with the standards (Carne Asade, Chicken Fresca, Carnitas, Chorizo, Garlic Shrimp etc.).