About 5 years ago, Juan Zavala had a business idea he just couldn’t get out of his head. On one of his yearly trips back to his native Argentina, he went to a gathering of family and friends, like he usually does when visiting. At one point, one of his cousins asked everyone whether they wanted to order pizza or empanadas. Just about everyone voted for empanadas. That’s when he thought to himself, “why don’t we have that in the States?” The more he thought about it, the …