Some of the interesting food to try are:
Bun Co - consist of rice noodles that's simmered in tomato, pork, escargot, fried tofu, mornig glory, banana blossom, and spring onions was interesting.
Banh Mi - a famous vietnamese sandwich where you can choose from Pork Ham, Lemongrass sliced beef, or Char Grilled Chicken.

Wok Fried Daylily flower with Salt and Garlic

Sea Snails - Vietnamese version of escargot.