How do you know if an ethnic restaurant is authentic? You look inside and see if people resembling that ethnicity are inside. Or, better yet, you let one of them take you there. At least that’s how it went down for me when a Taiwanese friend of mine invited me to Rose Tea Cafe in Squirrel Hill (supposedly the Oakland location isn’t as good) to get some Taiwanese food. Rose Tea Cafe isn’t just some tea house, it’s a full-on restaurant with almost too many options to choose. So we turned to my friend to figure out what to get.