Preheat your oven to 400°F (200°C) for even cooking.
In a mixing bowl, combine the chicken breasts, broccoli florets, chopped bell pepper, and snap peas. Toss together.
In a separate bowl, whisk together the soy sauce, sweet chili sauce, sriracha, minced garlic, and cornstarch to create a glaze.
Pour the sauce over the chicken and veggies. Stir well to coat everything.
Line your baking sheet with parchment paper. Spread the mixture evenly and bake for 20-25 minutes until the chicken is cooked through.
Once out of the oven, sprinkle sesame seeds on top, serve warm, and enjoy!