For Hoop Dee Doo I've always been offered the pasta with marinara sauce or steamed or roasted veggies with baked potato. The roasted veggies were actually really awesome.
For the Luau, I was offered couscous with tofu, veggie lasagna, or a veggie stir fry. I ordered the couscous dish and was actually pretty disappointed. Even though it had some sort of sauce on it, it was just super bland. I had actually read a good review of it at some point, so I don't know if it was an off night or what...the salad at the Luau is great, but overall the quality of food is better at HDDR, IMO.