The landscape will draw you to Bhutan, and the cuisine will make the trip.Credit: ALLEKO / Getty ImagesMany people come to Bhutan for the Himalayas and the natural landscape: the monasteries clinging to cliffs, the colorful prayer flags on mountain passes, the valleys carpeted in blue pine trees. The kingdom is small, roughly the size of Switzerland and the population of San Francisco. A mandatory guide system and daily visitor fee have kept tou…