Cut chicken breast and king oyster mushrooms into bite-sized pieces.
Thinly slice the garlic.
Heat olive oil in a pan and sauté the garlic.
Once fragrant, add the chicken breast and stir-fry.
When the chicken is halfway cooked, add the mushrooms and stir-fry together.
Season with salt and pepper.
Serve the stir-fried mixture over rice to finish.