Cut the hanging tender beef into bite-sized pieces.
Finely chop onion, celery, broccoli, garlic, and tomato.
Heat olive oil in a pot and sauté the garlic.
Add the hanging tender beef and stir-fry until the outside is cooked.
Add all the prepared vegetables and stir-fry together.
Pour in chicken stock and tomato sauce, then bring to a boil.
Season with salt, pepper, and herbs to taste.
Simmer over medium-low heat for 20 minutes to finish.