Step by Step Process: 1. Heat the olive oil in a large skillet or wok over medium-high heat. 2. Add the sliced beef to the skillet and cook until browned, about 3-4 minutes. Remove the beef from the skillet and set aside. 3. In the same skillet, add the sliced onion and minced garlic. Sauté until the onion becomes translucent, about 2-3 minutes. 4. Add the diced tomatoes to the skillet and cook for another 2 minutes, until they start to soften. 5. Return the cooked beef to the skillet and stir in the chili powder and cumin powder. Season with salt and pepper to taste. 6. Continue cooking for an additional 2-3 minutes, stirring occasionally, until the beef is cooked through and the flavors are well combined. 7. Remove from heat and garnish with freshly chopped cilantro. 8. Serve hot with steamed rice or tortillas. Note: This recipe serves 3 persons and provides approximately 280 calories per serving, with 30g of protein and 5g of fat. Adjust the portion sizes accordingly to meet your dietary needs. Enjoy your homemade Mexican cuisine!