Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Peel the golden beets and cut them into 1/2-inch cubes; dice the chicken breast into similar bite-sized pieces.
Place the beets and chicken on the baking sheet, drizzle with half of the olive oil, and season with garlic powder, sea salt, and black pepper.
Toss well to coat and spread in a single layer, ensuring the chicken and beets aren't overcrowded.
Roast for 20-25 minutes, or until the chicken is cooked through and the beets are tender and slightly caramelized.
While roasting, whisk together the remaining olive oil, lemon juice, chopped parsley, and chopped dill in a small bowl.
Transfer the roasted chicken and beets to a bowl, drizzle with the herb vinaigrette, and toss gently before serving.