Preheat your oven to 375°F (190°C).
Wash, peel, and thinly slice the root vegetables using a mandoline slicer or a sharp knife. Ensure uniform thickness for even cooking.
Grease a baking dish and line it with parchment paper.
Start arranging the sliced vegetables in layers, alternating colors for an appealing presentation. Drizzle olive oil between the layers and season with salt and pepper as you go.
Once you've filled the baking dish, cover it with foil and place it in the preheated oven.
Bake for approximately 45-50 minutes or until the vegetables are tender when pierced with a fork.
Remove the foil during the last 10 minutes of baking to allow the top layer to crisp up.
Once done, let it rest for a few minutes before garnishing with fresh herbs, if desired.