Wash and mash the internal organs with banana leaves with 3 Tbsp. salt to remove the musky odor.
Make sure that the intestines are very clean.
Boil the internal organs on a big pot until tender then remove from liquid and cut into 1/2 inch cubes. Set aside.
Saute ginger, garlic and onion. Stir fry until the onions are cooked and add the internal organs.
Stir fry again until some broth comes out of the internal organs.
Season with salt and pepper and adjust the amount according to your desired taste.
Stir fry for a few minutes then add some water, just enough to cover all the ingredients.
Simmer and add the beef tenderloin until the tenderloin is cooked.
Drop the red chili peppers and pour the bile little by little to prevent the dish from becoming too bitter.
Season with patis and adjust the amount according to your preference.
Serve hot and garnish with chopped spring onions.