Preheat the oven to 400°F (200°C).
Season the chicken thighs with salt, pepper, and cumin.
Heat olive oil in an oven-safe skillet over medium heat.
Sear the chicken thighs for about 5-7 minutes until golden brown, then flip.
Transfer the skillet to the oven and roast for 25-30 minutes, or until cooked through.
While the chicken is roasting, prepare the green sauce.
In a blender, combine cilantro, jalapeños, mayonnaise, lime juice, garlic, sugar, and a pinch of salt.
Blend until smooth and check for seasoning.
Once the chicken is done, let it rest for 5-10 minutes before serving.
Serve the chicken topped with the green sauce, along with your favorite sides.