Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Wash the potato and dice it into uniform 1-inch cubes for even cooking.
In a large bowl, toss the potato cubes with 0.25 tablespoons of olive oil, minced garlic, rosemary, thyme, and half of the sea salt and black pepper.
Spread the potatoes in a single layer on the prepared baking sheet and roast for 25-30 minutes until they are golden and crispy.
While the potatoes roast, season the chicken breast with the remaining sea salt, black pepper, and lemon juice.
Heat the remaining 0.25 tablespoons of olive oil in a skillet over medium-high heat.
Sear the chicken for 6-7 minutes per side until the exterior is browned and the internal temperature reaches 165°F.
Steam the green beans in a steamer basket over boiling water for about 5 minutes until they are bright green and tender-crisp.
Serve the sliced chicken breast alongside the herb-roasted potatoes and steamed green beans for a clean, nutrient-dense dinner.