Peel and wash the potatoes, then cut them into cubes. Finely mince the garlic and slice the onions. Heat oil in a pan over medium-low heat, then sauté the onions and garlic for 6-8 minutes.
Cut the beef chuck into smaller pieces. In a pot, add butter and oil, then add the beef with a bit of water to keep it tender. Once the meat starts to brown and release water, add a can of tomatoes (or blended fresh) and simmer for 5 minutes.
Season with garlic powder, black pepper, salt, oregano, and cumin. Mix well. Add the potato cubes and 2 cups of water (700 ml). Stir continuously, adjusting water as needed.
Incorporate the sautéed onions and garlic, then add tomato paste. Cook on medium-low heat for 60 minutes, or 1.5 to 2 hours for larger pieces of meat. Enjoy!