There's a definite gluttonous appeal to most American-style Mexican places, with their dishes heavy with sauce, sour cream, guacamole and ungodly calories. That's okay when we're craving a good, old-fashioned bomb in our bellies. But we hate to sacrifice real Mexican flavor and spice under all those toppings. That's why we love Mangos, where everything is made fresh, from its pizza-pie-size tortillas to its just-squeezed tropical fruit juices. Homemade tamales don't hold back the heat, dimpled with fiery shredded pork, green chile strips and jack cheese. Shredded beef enchiladas kick up a flurry of burning spice in their wake. Carne asada, overflowing a burrito with large chunks of perfectly grilled beef, packs a back-of-the-throat punch, thanks to lots of gutsy chiles.