The vegetarian subforum will be best, but just remember that carbs are the main thing to avoid, so fruit is generally the worst, carb-wise. Berries are ok in moderation but tropical fruit and bananas are problematic. Leafy greens and 'above-ground' vegetables are generally great- very healthy. Cabbage, salad, broccoli, cauliflower- all excellent. Root veg like carrots isn't so good. Corn is very carby, potatoes are very carby, onions are pretty carby although you tend to only have a little onion at a time. Pulses and beans, surprisingly, are actually pretty bad too. Grains and anything made of grains tends to be problematic. Pumpkin type veg, gourds and squash etc are pretty high carb. Still, there's loads of good leafy green options, and things like runner-beans and string beans are good. If you can have eggs, they are very good, full-fat hard cheese is generally very good. Milk is pretty bad, with skimmed milk being the worst, and double cream being pretty ok.
Now obviously everybody reacts differently, and you may be able to tolerate some of the more carby foods quite well- some people spike from tomatoes, but they seem ok for me, for example. I would just suggest that in general, the main guiding principle for T2 is to avoid carbs. The more carbs in the food, the more care you should take.