Preheat the oven to 425°F.
In a small bowl, mix the Greek yogurt, lemon juice, chopped fresh herbs, minced garlic, salt, and pepper to create a creamy marinade.
Place the chicken breast on a cutting board and lightly pound to an even thickness. Season with salt and pepper.
Coat the chicken evenly with the lemon herb yogurt mixture. Let it marinate for at least 15 minutes.
While the chicken marinates, toss the green beans with olive oil, salt, and pepper on a baking sheet.
Roast the green beans in the oven for about 15-20 minutes until tender and slightly charred.
Meanwhile, heat a non-stick skillet over medium-high heat. Sear the marinated chicken for 3-4 minutes per side until golden brown.
Lower the heat and cook the chicken through for another 5-6 minutes, or until the internal temperature reaches 165°F.
Plate the chicken alongside the roasted green beans. Drizzle any remaining marinade over the top if desired.
Serve immediately and enjoy your flavorful, protein-packed meal.