Pat the chicken thighs dry with a paper towel and season both sides with sea salt and black pepper.
In a small glass bowl, whisk together the tamari, raw honey, toasted sesame oil, grated fresh ginger, and minced garlic to create the teriyaki glaze.
Heat the avocado oil in a large stainless steel or cast iron skillet over medium-high heat until shimmering.
Place the chicken thighs in the skillet and sear for 5-6 minutes per side until the exterior is golden and crispy and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest on a plate; add the broccoli and sliced bell peppers to the same skillet with two tablespoons of water.
Cover the skillet with a lid for 2 minutes to steam the vegetables until they are bright green and crisp-tender.
Remove the lid, return the chicken to the pan, and pour the teriyaki glaze over the chicken and vegetables.
Toss everything continuously for 1 minute until the sauce reduces into a thick, glossy coating.
Plate the chicken and vegetables immediately, garnishing with sesame seeds for added texture.