I'd probably do roasted veggies, and the nice thing is that you can stick them in the oven with the roast for very little extra effort. I'd probably do summer veggies: some mix of zucchini, asparagus, mushrooms, cauliflower florets, halved cherry tomatoes, onions, carrots, or broccoli. Toss with olive oil, sprinkle with salt and pepper and garlic powder, and throw in the oven.