Cut chicken breast into bite-sized pieces.
Chop onion and garlic finely.
Heat olive oil in a pan and sauté the onion and garlic.
Add the chicken breast and stir-fry until cooked.
Add vegetables such as zucchini and spinach and stir-fry together.
Pour in low-sodium chicken stock and water, and bring to a boil.
Season with salt and pepper.
Serve the finished soup in a bowl.