Tacos can come with a wide variety of meat fillings, salsas, and toppings, but one common topping in America is never used in traditional Mexican street tacos.

Transform raw onions into a sweet-tart, mellow topping for tacos, salads, and more—using nothing but lime juice, salt, and a little time.

Taco Bell, the California-based Mexican-inspired fast food chain, has launched new menu items including chicken and steak Cheesy Street Chalupas.