La Feria de los Moles—the country’s largest (really!) annual Mexican Food Festival—is returning to the cobblestone corridors of Los Angeles’ historic Olvera Street Plaza on September 28. The all-day cultural event features live music, folk dances, and focuses on, you guessed it, mole: a fragrant, pre-colonial Mexican sauce that is regionally specific and whose roots are often traced back to Puebla. Elenita’s Mole, Moles Tepatlaxco, El Valle Oaxaqueno, Juquila Restaurant are a few of the participants among a host of other mole makers and sweet shops, including Mr. Churro. Admission is free, bring cash for food.