Heat olive oil in a large skillet or work over medium-high heat. Add the chicken strips and cook until golden brown and fully cooked, about 5-6 minutes. Remove and set aside.
In the same skillet, add broccoli, bell pepper, carrots, onion, garlic, and ginger. Cook 4-5 minutes, stirring often, until tender-crisp.
In a small bowl, whisk together soy sauce, rice vinegar, sweetener, sesame oil, red pepper flakes, and water.
Return the chicken to the skillet, pour the sauce over, and stir to coat. Simmer for 2-3 minutes until heated through.