Cut the chicken breast into bite-sized pieces.
Chop vegetables such as onion, bell pepper, and broccoli into edible sizes.
Heat olive oil in a pan and stir-fry the chicken breast.
When the chicken breast is half cooked, add the vegetables and stir-fry together.
Pour in the tomato sauce and bring to a simmer, stirring occasionally.
Season with salt and pepper to taste.
Once all the ingredients are cooked through, plate and serve.