Preheat oven to 400°F.
Line a rimmed baking sheet with parchment paper.
Gently wash produce under cool running water, pat dry, and prepare as directed. Cut all vegetables into similar-sized pieces so they roast evenly.
Place the cut vegetables on the baking sheet in a single layer. Vegetables should not overlap.
Drizzle with the olive oil. Using clean hands, distribute the oil over the vegetables — there should be a very light coating.
Sprinkle with the salt and pepper.
Place the baking sheet in the preheated oven and roast for 20–30 minutes. Cooking time will vary with the size of the vegetables.
Check to be sure the vegetables are not getting too brown. The tomatoes may blister or pop.
Remove from the oven and serve immediately.