I picked up a variety of mini and baby vegetables from Costco the other day – baby squash, mini peppers and little tomatoes. They turned out to be fantastic when roasted in the oven with olive oil and salt. They taste great right out of the oven or even cold.
If finding these mini/baby vegetables is tough, you can just use regular Italian squash and regular bell peppers chopped into chunks.
Then just before serving, I like to sprinkle some freshly chopped basil leaves on top for extra flavor.