For an extra layer of flavor, lightly sear the chicken thighs in a hot pan before adding them to the slow cooker. This will enhance their color and create a delicious crust. Adjust the amount of sweet chili sauce to suit your preference for spice. If you prefer a milder flavor, start with 1/4 cup and add more to taste. Serve over steamed jasmine rice or udon noodles for a complete and satisfying meal. A side of stir-fried vegetables would also complement this dish beautifully.