Preheat oven to 450 degrees.
Season chicken with salt and pepper.
Heat 1 tablespoon oil in a cast iron skillet on high heat.
Heat to the smoking point but not smoking.
Arrange chicken thighs skin side down.
Cook for 2 minutes and reduce heat to medium high.
Cook for another 12 minutes.
Finish Cooking
Transfer chicken to a bowl and coat well with the sweet chili sauce. Let sit for 5 – 10 minutes.
Return chicken to cast iron skillet skin side up and cook for 20 – 25 minutes.
Brush the marinade on the chicken one more time.
Bake for 15 minutes.
Let rest for a few minutes and garnish with the lemons and cilantro.
Serve and enjoy!