These are the cheapest breakfast tacos in town, and also the best. For only $1 (no tax), you get a thick, fluffy flour tortilla packed with the only option Tacos Tierra Caliente usually offers: eggs, potato, ham and chorizo. What the cooks make is what you get, and what they make at this unassuming but wildly popular taco truck across the street from West Alabama Ice House has become the stuff of legend in Houston. The breakfast tacos, served until 11:30 a.m., have a slight griddle flavor from the meat and eggs cooked to well done somewhere in the dark recesses of the truck. That flavor and the numbingly spicy green and red salsas seem prepared specifically to express Tacos Tierra Caliente's morning goal: Are you awake yet? Now you are!