Pat the chicken breast dry and cut into 1-inch bite-sized pieces.
In a small bowl, toss the chicken with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Remove the chicken from the skillet and set aside.
In the same skillet, add the broccoli, bell pepper, and snap peas with a splash of water. Cover and steam for 2 minutes.
While the veggies steam, whisk together the orange juice, coconut aminos, minced ginger, and minced garlic in a small jar.
Remove the lid from the skillet and pour the orange sauce over the vegetables.
Add the chicken back into the pan and stir constantly for 1-2 minutes until the sauce thickens into a glossy glaze.
Remove from heat and drizzle with toasted sesame oil.
Serve immediately over the warm cooked brown rice.