Cook the beef filling

• Heat the olive oil in a frying pan over medium heat.
• Add the onion and garlic and cook until softened.
• Add the ground beef, salt and black pepper and break it up with a spatula.

Warm the tortillas

• Warm the tortillas in the pan or a dry pan until soft and pliable.

Assemble the tacos

• Fill each tortilla with the beef mixture.
• Top with tomato, lettuce and cheddar cheese.
• Serve immediately.