Season chicken thighs with salt and pepper on both sides.
Preheat large ceramic non-stick skillet on medium-high heat and pan sear chicken until skin is crispy and meat is golden brown, working in batches. No need to cook it through.
Transfer chicken to the bottom of slow cooker and pour sweet chili sauce on top. Cover and cook on Low for 6 hours or on High for 3 hours.
After your chicken thighs are ready. If you would like to slightly thicken the sauce, cook with a lid open on High heat for 20-30 minutes.
Serve chicken thighs hot garnished with green onions, a side of rice or quinoa and a simple salad.
Notes
Store: Refrigerate in an airtight container for up to 5 days.
Freeze: In an airtight container or freezer bag for up to 3 months.
For boneless skinless chicken thighs: You can reduce the cook time to 5 hours on Low or 2 hours on High. Also be sure to add 1/2 cup water to the crockpot as they release less juice.
The slow cooker times: If you're using a smaller crockpot, chicken will take longer to cook through. Also some slow cooker run lower, so add a bit more cook time.