Place the vegetables on a rimmed 18 x 13-inch baking sheet. Drizzle olive oil and season with salt, pepper and garlic powder.
Use your hands to toss the vegetables. Then spread out into an even layer, making sure the vegetables are not overlapping.
Roast for 15 to 30 minutes depending on the vegetable.
Notes
Storage: Store any leftover vegetables in an airtight container for up to 5 days.Reheat: To maintain crispness, reheat in a 350° oven. Start checking after 10 minutes.