Wash the basil thoroughly and remove any excess moisture.
Combine pine nuts, garlic, olive oil, Parmesan cheese, basil, and salt in a blender and blend to make basil pesto.
Boil the chicken breast in water until cooked, then cut into bite-sized pieces.
Cut cherry tomatoes in half and slice the cucumber thinly.
Layer the basil pesto, chicken breast, cherry tomatoes, cucumber, and baby leaf greens in a jar in this order.