Heat oil, add pork, salt and pepper; brown thoroughly on all sides. Remove and set aside.
Add onion, garlic, ground beef, salt and pepper; stir and cook until beef is well-browned.
Add puree, paste, water, sugar, and baking soda. Stir, let simmer for 5 minutes.
Add pork and continue to cook about 1 hour or until pork is fork tender.