Preheat oven to 220°C / 425°F.Pro Tip: High heat caramelizes sugars without steaming the veggies.
Toss all vegetables in oil, salt, pepper, and optional seasonings. Spread evenly on a large sheet pan.Pro Tip: Avoid crowding; overcrowded pans steam rather than roast.
Roast for 20–25 minutes, flipping halfway, until edges are golden and tender.Pro Tip: Remove smaller pieces earlier if needed to prevent burning.
Cool completely before storing if not using immediately.Pro Tip: Cooling prevents condensation in storage containers, preserving texture.