Preheat oven to 425 degrees F and line a large rimmed baking sheet with foil or parchment paper.
Cut 1.5 pounds of boneless skinless chicken breasts into bite-sized pieces and season with about 1/2 teaspoon salt and 1/2 teaspoon black pepper.
Wash/trim/prep all of your vegetables including broccoli florets, carrots, red bell peppers, and sugar snap peas.
Make the sauce - in a small bowl combine olive oil, brown sugar, soy sauce, honey, dijon mustard, garlic cloves, apple cider vinegar, corn starch, salt and black pepper. Whisk to combine.
Pour half of the sauce over the chicken and toss to coat.
Pour remaining sauce over the veggies and toss to coat.
Arrange the chicken and vegetables in a single layer on the prepared baking sheet.
Bake for 20-22 minutes, or until the chicken has reached an internal temperature of 165 degrees F and veggies are tender.