Cut the chicken breast into bite-sized 1-inch cubes and pat them dry with a paper towel.
In a medium bowl, toss the chicken cubes with arrowroot starch, sea salt, and black pepper until evenly coated.
Heat 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, then remove and set aside.
In the same skillet, add the broccoli florets and sliced red bell pepper, sautéing for 3 minutes until vibrant and crisp-tender.
Stir in the minced garlic and grated ginger, cooking for 30 seconds until fragrant.
In a small jar, whisk together the fresh orange juice, coconut aminos, and honey.
Return the chicken to the skillet and pour the orange sauce over the mixture.
Simmer for 1-2 minutes until the sauce thickens into a glossy glaze that coats the chicken and vegetables.
Garnish with toasted sesame seeds and serve immediately.