Wash the bell pepper, cucumber, and cherry tomatoes thoroughly, then cut them into bite-sized pieces.
Boil the chicken breast in boiling water, let it cool, then tear it into strips along the grain.
Cook the pasta in salted boiling water, rinse under cold water, and drain well.
Put the pasta, prepared vegetables, and chicken breast into a bowl.
Add olive oil, lemon juice, salt, and pepper, then mix well.