Heat the cooking oil in a cooking pot.
Saute the garlic and onion.
Add the pata and cook for 3 to 5 minutes or until all sides are light to medium brown.
Pour-in the fish sauce, tomato sauce, and water. Add the beef cube (or powder). Let boil.
Cover and then simmer for 50 to 70 minutes.
Add the potato, banana, and calabaza squash. Cook for 5 to 7 minutes.
Put-in the bok choy (or pechay) and then sprinkle some ground black pepper. Cover.
Turn the heat off. Let the cover stay for 5 minutes until the residual heat cooks the bok choy.
Transfer to a serving bowl. Serve.
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