Season the chicken breast with salt and pepper.
Drizzle olive oil in a pan and cook the chicken breast until done.
Cut the chicken breast into bite-sized pieces.
Cut the vegetables (romaine, cherry tomatoes, cucumber, etc.) into bite-sized pieces.
In a bowl, mix the vegetables, chicken breast, and basil leaves.
Make a dressing with olive oil, balsamic vinegar, salt, and pepper, then drizzle over the salad.