Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the golden beet and slice it into thin half-moons; cut the broccoli into uniform, bite-sized florets.
Slice the chicken breast into 1-inch strips to ensure they cook evenly alongside the vegetables.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, dried oregano, sea salt, and black pepper.
Place the chicken strips, beet slices, and broccoli florets on the prepared baking sheet and pour the lemon-herb dressing over them, tossing well to coat every piece.
Spread the ingredients out into a single layer to ensure they roast rather than steam.
Bake for 20 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly caramelized edges.
Remove from the oven and serve immediately, drizzling any remaining juices from the pan over the top.