Preheat oven to 220 degrees C (425 F).
Line a baking tray with aluminum foil and spray a thin layer of olive oil over the top of the foil.
Place vegetables on the baking tray in a single layer. Sprinkle salt and pepper over them, then spray another thin layer of olive oil on top.
Bake on the middle rack at 220 degrees C (425 F) for 35 to 40 minutes. Every 15 minutes, check the veggies and flip them, spraying extra oil on them if surface has turned dry.
Cook the veggies in batches if the baking tray is not big enough.
Right before serving, drizzle balsamic glaze over the veggies.
Serve warm or cold.