una pagina sencilla de restaurante

var menu = {
  "hamburgesas" : ["h1", "h2", "h3"],
  "bebidas" : ["coca", "pepsi", "trina"],
  "papas" : ["p1", "p2"]
}

function printMenu(menu) {
  for(var category in menu) {
    if (menu.hasOwnProperty(category)) {
      console.log(category)
      var items = menu[category]
      for(var item in items) {
        if (items.hasOwnProperty(item)) {
          console.log("- " + items[item])
        }
      }
    }
  }
}

printMenu(menu)