Pat the chicken breast dry with a paper towel and cut into bite-sized 1-inch cubes.
Season the chicken cubes evenly with sea salt and black pepper.
Heat the avocado oil in a large wok or cast-iron skillet over medium-high heat until shimmering.
Add the chicken to the pan in a single layer and sear for 3-4 minutes until golden brown and cooked through, then remove and set aside.
In the same pan, add the broccoli florets, sliced bell pepper, and snap peas, stir-frying for 4-5 minutes until tender-crisp.
Add the minced garlic and grated ginger to the vegetables, stirring constantly for 30 seconds until fragrant.
Return the cooked chicken to the pan and pour in the coconut aminos and toasted sesame oil.
Toss everything together for 1 minute to allow the sauce to glaze the ingredients before serving hot.