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Cut the beef tenderloin into bite-sized pieces.
Prepare onion, potato, carrot, celery, and cabbage into easy-to-eat sizes.
Heat olive oil in a pot and sautรฉ the beef tenderloin.
Add onion, potato, carrot, and celery and stir-fry together.
Add water and tomatoes (or tomato purรฉe) and bring to a boil.
Add cabbage and herbs (such as thyme, basil, etc.) and simmer over medium-low heat.
Season with salt and pepper to taste.
Serve the soup in a bowl.
