Put beef in a large pot and pour water just enough to cover the meat.
Bring to a boil then lower the heat to simmer. Remove the scum floating above the broth then cover. Let it simmer for about 1 hour.
Meanwhile broil the pork liver until medium rare. Grind or chop finely. Combine liver with cheese, tomato sauce, vinegar, sugar, salt, bell peppers and olives. Stir until smooth. Set aside.
In a large skillet, heat olive oil and saute garlic until fragrant. Add in the onions and saute until soft. Then add in the chorizo and mix.
Stir in liver mixture and simmer for about 15 minutes or until mixture turns lighter in color.
Pour liver mixture into the beef in the pot and simmer for another 15 minutes.
Simmer until the sauce thickens and beef is already tender. Add some water if the sauce becomes too dry while simmering the beef.
Season with salt and pepper to taste. Serve hot with steamed rice. Enjoy!