In a large pot or Dutch oven, heat olive oil over medium-high heat.
Season the chicken thighs thoroughly with salt, black pepper, garlic powder, onion powder, thyme, and rosemary.
Once the oil is shimmering, place the chicken thighs skin-side down. Sear for 5-7 minutes until the skin is deep golden brown and crispy.
Flip the chicken and cook for another 5 minutes, then remove from the pot and set aside on a plate.
To the same pot, add lemon zest, lemon juice, and chicken broth. Use a wooden spoon to scrape up the flavorful browned bits from the bottom of the pan.
Bring the liquid to a simmer, then add the halved baby potatoes and green beans.
Return the chicken thighs to the pot, nestling them skin-side up on top of the vegetables.
Cover the pot and reduce heat to low. Simmer for 25-30 minutes until the chicken is cooked through (internal temperature of 165°F) and potatoes are fork-tender.
Remove from heat and let the dish rest for 5 minutes. Garnish with fresh chopped parsley before serving.