In a large skillet or wok, heat the vegetable oil over medium-high heat. Add the chicken pieces and season with salt and pepper. Cook until browned and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, add the sliced bell peppers and sugar snap peas. Stir-fry for about 3-4 minutes until the vegetables are tender-crisp.
Add the minced garlic and ginger to the skillet and stir-fry for an additional 1 minute until fragrant.
In a small bowl, whisk together the soy sauce, honey, cornstarch, and water until smooth. Pour the sauce into the skillet and bring to a simmer.
Return the cooked chicken to the skillet and add the diced mango. Stir well to coat everything in the sauce and cook for another 2-3 minutes until heated through. Drizzle with sesame oil before serving.
Serve the mango chicken stir fry over cooked rice or noodles.
Notes
For added heat, include sliced jalapeños or a dash of red pepper flakes when cooking the vegetables.
Substitute the mango with pineapple or peaches for a different fruity flavor.