All kinds of roasted veggies can be made as well: broccoli, cauliflower, beets, carrots, Brussels sprouts, spaghetti squash, acorn squash, etc. Toss any of them with a little EVOO, salt, pepper maybe a little garlic and onion powder and roast at 425. I usually prepare in the oven, but if your pit gets hot enough will work great in the pit as well. I don't have a recipe, usually just cut up the veggie, toss with the oil and seasonings then throw them in the oven.
Not sure what your diet will allow, but, with the broccoli and cauliflower I usually sprinkle with some shredded parm cheese the last 10 minutes, and with the spaghetti squash I cut them in half brush with a little EVOO, put some butter and brown sugar and roast them cut side up.