Steam and drain chopped broccoli. Mix with bell pepper, mayonnaise, garlic powder and cheddar cheese.
Divide filling between flattened chicken breasts.
Fold chicken over using toothpicks to seal edges and keep the filling in.
Sear chicken in an oven safe skillet over medium high heat for 3-4 minutes on each side.
Cover with foil and bake at 425° for about 15 minutes or until chicken reaches 165°.