Begin by prepping your chicken stir fry sauce. Place all ingredients (minus the cornstarch) for the sauce in a medium bowl or pyrex and whisk until combined. Set aside.
Next, prep veggies by thinly slicing red pepper and chopping broccoli florets into bite-sized pieces. Set aside.
Slice chicken breast into thin slices and set aside.
Next, heat 1 tablespoon of olive oil in a large pan over medium/high heat. Add chicken breast and saute for about 5-7 minutes or until almost fully cooked. Remove from heat.
Add the second tablespoon of olive oil into the pan and sautee veggies for about 2 minutes. Then, add in about 2 tablespoons of water and cover pan. Let steam for about 3-5 minutes or until broccoli is cooked, yet still a little crunchy.
Once veggies are almost cooked, move them to one side of the pan and add the sauce to the other side of the pan. Then, add 2 teaspoons of cornstarch to sauce and whisk until dissolved.
Add chicken pieces back into the pan and mix everything together. Let simmer for an additional 2-3 minutes.
Serve with your favorite grain or meal-prep for later!