I eat a lot of legumes as well. Easy to prepare, but one thing you have to be careful, if you're using canned beans, is sodium. So many of them are sky-high. Vegetable curries and stir fries (again, watch the sodium with stir fries), and some creative dishes involving mushrooms (small brown button ones are just baby portabella so I use them a lot).

Can you eat brown rice? I switched to brown rice about a year ago and haven't looked back.

If you're having digestive issues, try mastic gum (supplement, check online). I had a variety of digestive problems a while back, feeling sick after eating, bloating, IBS, etc. Thinking I might have h-pylori, I started taking mastic gum and De-Glycyrrhizinated Licorice Extract and noticed a change in short order. I googled recently if mastic gum might also be good for parasites (I live with pets, so I started to worry) and it should take care of some parasites.