In a large pot, heat the vegetable oil over medium heat.
Add the onion and red pepper and sauté until onions are translucent, about 3 minutes. Then add the tomatoes, garlic, salt and ground pepper and sauté for 5 more minutes.
Add the beef, water, beef bouillon and cumin powder. Reduce the heat to medium low cover and cook for 45 to 50 minutes, stirring occasionally.
Add the potatoes, yuca and cilantro and cook for an additional 30 minutes or until the vegetables are tender.