Preheat your oven to 500 degrees Fahrenheit to get that initial, crucial blast of heat.
Season the chicken thighs on both sides with salt and pepper.
This base seasoning is critical for enhancing the meat's flavor.
Heat a large sauté pan over medium heat and add olive oil.
You want the oil to be shimmering before you add the chicken.
Place the chicken thighs skin-side down in the pan.
Cook until the skin is golden and crispy, which usually takes about 5 minutes.
Transfer the pan to the oven and bake for about 15-20 minutes, until the chicken is cooked through.
Add lemon juice and rosemary in the last few minutes for extra flavor.