Roasting is one of the best techniques for getting the maximum amount of flavor out of vegetables. They become super tender, sweet on the inside and a bit caramelized on the outside.
Place all the vegetables on a large baking sheet. Drizzle with olive oil and toss to coat all the vegetables and sprinkle with salt. Alternatively at this point you can place the vegetables in a large zipper bag and refrigerate overnight.
Roast for 50 minutes, stirring halfway through, or until tender and golden.
Remove the vegetables from the oven, drizzle with maple syrup and roast an additional 5 minutes or until caramelized and golden.