Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
In a small bowl, combine the softened grass-fed butter, minced garlic, dried rosemary, dried thyme, sea salt, and black pepper, mashing with a fork until a smooth paste forms.
Pat the chicken breast completely dry with paper towels to ensure the butter adheres and the skin gets golden.
Spread the herb butter mixture evenly over all sides of the chicken breast.
Trim the ends of the green beans and slice the carrots into thin rounds.
Toss the green beans and carrots with the olive oil and a small pinch of salt and pepper on the prepared baking sheet.
Move the vegetables to the sides of the pan and place the buttered chicken breast in the center.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly caramelized.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays juicy.