1. Heat a skillet over medium heat and add a splash of oil.

2. Add diced onion and sauté until soft, about 3 minutes.

3. Stir in the minced garlic and cook for 1 more minute until fragrant.

4. Add ground beef, breaking it apart as it cooks. Continue stirring until browned and no longer pink.

5. Drain excess fat if needed.

6. Sprinkle in taco seasoning and pour in water or broth.

7. Stir to combine, reduce heat, and simmer for 5 to 7 minutes until the mixture thickens.

8. While beef simmers, warm taco shells in oven or microwave.

9. Fill each taco shell with beef mixture.

10. Top with lettuce, tomatoes, cheese, sour cream, and any additional toppings like hot sauce.