Preheat your oven to 425°F (220°C) and line a rimmed baking sheet with parchment paper - trust me, this makes cleanup so much easier!
On your cutting board, make sure your root vegetables are cut to a similar size.
Chop up your thyme or measure out the dried thyme.
In a small bowl, measure out your olive oil, honey, balsamic vinegar, sea salt, and black pepper to make that gorgeous balsamic mixture.
Whisk the marinade ingredients together.
Put thyme in with the carrots and the honey balsamic vinegar marinade.
Stir the carrots around until they are really well coated with the honey balsamic vinegar marinade.
Remove the carrots and set them aside in a separate bowl. Don't worry, we'll roast the carrots in a bit! You need to keep the remaining honey balsamic vinegar mixture in the large bowl.
Now add your beet wedges in that same balsamic mixture and make sure they're completely covered.
Remove the beets from the bowl and place on one side of the parchment paper and pop them in that hot oven for 12 minutes. We are giving the beets a head start, because they take longer to roast than carrots. We will keep the beets and carrots separate for two reasons. First of all, beets take longer to cook, so they need to go in sooner. Secondly, beets turn pretty much everything they touch red, and we like to help carrots keep their natural color.
Keep the remaining honey and balsamic marinade in the same bowl as before.
After roasting for 12 minutes, take the roasted beets out and re-coat them with any remaining balsamic vinegar mixture. This extra step makes them so much more flavorful! Then put them back on the same side of the parchment paper where you just took them off.
Now add your carrots to the other side of the parchment paper and put the whole pan back in the oven. Bake for another 20-25 minutes until both vegetables are tender and have those beautiful golden-brown edges. It's a good idea to take out the veggies and flip them around a bit to prevent burning. Also, the beets might need a few extra minutes since they're denser, so just test with a fork!