Heat the olive oil in a skillet over medium heat. Add the chopped onion and cook until it turns soft and translucent, about 5 minutes.

Add the ground beef to the skillet. Cook until fully browned and no longer pink, breaking it apart as it cooks.

Mix in your favorite spices, then pour in the tomato sauce. Simmer for about 5-7 minutes.

Lay a large flour tortilla flat. Spoon a generous amount of the beef mixture and sprinkle with shredded cheese.

Fold in the sides of the tortilla and roll it up tightly, securing the filling inside.