Heat oil in the pot and fry the banana until color turns golden brown. Once done, set the bananas aside
Put in the chorizo in the same pot and fry for about 3 to 5 minutes then set aside
Saute the garlic, onion, and tomato
Add the beef and cook for 5 minutes
Add the fish sauce, tomato sauce, and whole peppercorn and mix well
Add the water and simmer until meat is tender (about 35 minutes in pressure cooker)
Put-in the fried chorizo, fried banana, potato, and garbanzos and simmer for 7 minutes
Add the cabbage, long green beans and simmer for 5 minutes
Add the bok choy and turn off the heat. Cover the pot for 5 minutes to cook the bokchoy
Serve hot.