Pat the chicken breast dry and cut into bite-sized 1-inch cubes.
In a medium bowl, toss the chicken cubes with cornstarch, sea salt, and black pepper until evenly coated.
In a small jar, whisk together the honey, tamari, minced garlic, grated ginger, and sesame oil to create the glaze.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and sear for 3-4 minutes per side until golden brown and crispy.
Remove the chicken from the pan and set aside on a plate.
Add the broccoli florets and sliced red bell pepper to the same skillet, adding a splash of water if needed to steam-cook for 3 minutes.
Return the chicken to the pan and pour the honey-garlic glaze over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and coats the chicken and vegetables beautifully.
Garnish with sliced green onions and sesame seeds before serving hot.