Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel the red beets and carrots, then dice them into uniform half-inch cubes to ensure even cooking.
Toss the diced vegetables on the baking sheet with half of the olive oil and a small pinch of sea salt.
Roast the vegetables for 25 to 30 minutes, tossing halfway through, until they are tender and slightly charred on the edges.
While the vegetables roast, heat the remaining olive oil in a large skillet over medium-high heat.
Add the ground beef to the skillet, breaking it into small crumbles with a wooden spoon as it browns.
Season the beef with the garlic powder, dried thyme, remaining sea salt, and black pepper, cooking until no pink remains.
Once the root vegetables are finished roasting, add them directly into the skillet with the beef and stir to combine before serving.