Remove excess fat from the chicken thigh and cut into bite-sized pieces.
Season the chicken thigh pieces with salt and pepper.
Heat olive oil in a pan and cook the chicken thighs until golden brown on both sides.
Wash the lettuce and tomato, then cut them into appropriate sizes.
Slice the bread in half and toast lightly in a toaster.
Place lettuce, tomato, and the grilled chicken thigh on the bread in order.
Add your preferred sauce, cover with the other slice of bread, and finish.