Cut the chicken breast into 1-inch cubes and place them in a medium bowl.
Sprinkle the almond flour, sea salt, and black pepper over the chicken, tossing until each piece is thoroughly coated.
Heat the avocado oil in a large non-stick skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and cook for 5-6 minutes, turning occasionally, until the coating is golden and the chicken is cooked through.
Remove the chicken from the pan and set aside on a plate.
Wipe the pan if necessary, then add the toasted sesame oil along with the broccoli, bell pepper, and snap peas.
Stir-fry the vegetables for 3-4 minutes until they are vibrant and tender-crisp.
Add the minced ginger and garlic to the pan, sautéing for 30 seconds until the aroma is released.
Return the chicken to the pan, pour in the tamari, and toss everything together for 1 minute to create a light, savory glaze.