Cut the pork leg into bite-sized pieces.
Chop the tomato, onion, carrot, and celery into pieces that are easy to eat.
Heat olive oil in a pot and sauté the pork.
Add the vegetables and stir-fry together.
Pour in water and tomatoes, then bring to a boil.
Season with salt and pepper.
When the vegetables and meat are cooked through, it's ready to serve.