1. Heat the olive oil in a skillet over medium-high heat.
2. Add the ground beef to the hot skillet and cook until browned, about 5 to 7 minutes.
3. After that time, add the taco seasoning and continue cooking over slightly reduced heat until the sauce has thickened about 3 to 5 minutes.
4. Once cooked, remove the beef from heat and set aside to cool slightly.
5. Once slightly cooled, build tacos by adding beef, lettuce, tomatoes, red onions, and cheese to the tortillas.
6. Once the tacos are built, serve, and enjoy!