If this is really URGENT, here are a couple fast things to make (and your post is here a few times, so it must be urgent!)
This comes from the Food Blogs We Love column on this site:
Cauliflower casserole, cheesy top. You could substitute broccoli.
Chop your potatoes into similar sized pieces (so they all cook around the same time), toss them with a few tablespoons of olive oil. Sprinkle on some salt and pepper. If you have herbs such as rosemary or thyme, chop a tablespoon or two of that and mix in with you hands as well. Spread them out in a baking sheet with a little air in between the slices - use a sheet of parchment on top of the baking sheet if you want less clean-up. Roast the potatoes in a pre-heated 375 oven for 40 minutes. Once during cooking, use a flat pancake spatula to scoop up a bunch and turn them over. At 40 minutes, use a knife or fork to pierce one of the thicker potato pieces. If there is no resistance, they are done.
Is the urgency degree on the scale of, "need to produce within 2 hours for guests"? Could you provide some additional detail? Thanks!