About La Pupusa Loca Grille After getting their start in Ashland Maria and Francisco Cortez has opened up La Pupusa Loca Grill on Waverly street in Ashland Massachusetts. The La Puposa Local Grille serves up a great combination of Salvadoran and Mexican cuisine. From the mouthwatering Tacos to the delectable Burritos, La Pusa Loca is a a must have on your list of restaurant to do's.