Not help with tendon as not something I look for - there are a few HK cafes in Chinatown that might have it.
For dim sum and Cantonese, Cai or Minghin in Chinatown. Qing Xiang Yuan for dumplings. Slurp Slurp for handpulled noodles. Homestyle taste for Northern/Dongbei. Do not go to Lao SzeChuan - I've heard good things about Szechuan JMC but haven't been there myself.