Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Scrub the russet potato and cut it into 1-inch cubes, keeping the skin on for extra fiber.
In a mixing bowl, toss the potato cubes with 0.25 tbsp of olive oil, minced garlic, half of the rosemary, half of the thyme, and a pinch of salt and pepper.
Spread the potatoes in a single layer on the baking sheet and roast for 25-30 minutes until golden and crispy.
While the potatoes roast, season the chicken breast with the remaining rosemary, thyme, salt, and pepper.
Heat the remaining 0.25 tbsp of olive oil in a skillet over medium-high heat.
Sear the chicken breast for 6-7 minutes per side until the internal temperature reaches 165°F.
Steam the green beans in a small amount of water for 5 minutes until they are vibrant and tender-crisp.
Drizzle the fresh lemon juice over the chicken and serve immediately alongside the roasted potatoes and steamed green beans.