DD has no teeth either! We've only just started to get her to swallow things properly, after about 6 weeks of BLS.
Boiled sweet potato went down well with DD, was the first thing she actually swallowed properly.
I'd roast a bit of potato, pumpkin, squash, just anything that can be cooked softly, but maintain it's shape to hold.
DD likes custard apple too, and chunks of avocado, oh and banana, and those Laughing Cow cheese triangles.
Good luck!