Preheat your oven to 425°F, line baking sheets or cast-iron pans with parchment paper.
chop the root vegetables into uniform one-inch pieces, dice the onion, and mince the garlic.
After prepping the vegetables and aromatics, place them in a large bowl and drizzle with avocado oil. Toss to coat the vegetables in oil, then add salt and black pepper. Stir again to evenly distribute the seasoning.
Spread the oiled and seasoned vegetables in a single layer evenly over the lined baking sheets or cast-iron pans. Bake for 30 minutes, rotating at the halfway point.
After 30 minutes, remove the trays from the oven and evenly sprinkle the chopped herbs over all the vegetables. Stir around or toss vegetables, then return to an even layer.
Return the baking sheets to the oven for 15-20 minutes until vegetables are fork-tender and caramelized. Serve roasted vegetables warm with your favorite main dish.
Serve roasted vegetables warm with your favorite main dish.