What you need:
-1-2 t. olive oil
-variety of roasted vegetables: some good ones are: broccoli, cauliflower, asparagus, brussel sprouts, sweet potatoes, turnips, carrots, zucchini, cubed squash, bell peppers.....
What to do:
-Preheat oven to 400 degrees. Chop all veggies into bite-size pieces. I just cut asparagus in half, though.
-Toss the vegetables, oil, salt, and pepper in a bowl. Heck, toss them right in the pan if you don't want to dirty a bowl! I'm extra lazy so I line the pan with aluminum foil.
-I usually cook for about 40 minutes. It depends on how crisp/cooked you like your veggies.
I'm pretty sure this would be approved for any diet out there. :) It's hard to define nutrition information for it, because it just depends on the veggies you use. For weight watchers, using 1 sweet potato, 1.5 t. olive oil, and the veggies pictured above it is 2 points for 1/8 of the veggies on the pan.