1.   Add tomatillos, New Mexico chiles, serrano chiles, lime juice, sugar and chicken broth.

2.   In medium bowl, whisk together vegetable oil, garlic, mustard, salt, lemon juice, vinegar, serrano chile, cayenne and cilantro.

3.   Indeed, one of the house favorites is Filete Grito, a slab of beef tenderloin on a nopal leaf spiked with serrano chiles.

4.   Most Vietnamese cookbooks suggest substituting serrano chiles, available at most supermarkets.