Heat the olive oil in a large skillet over medium-high heat.
Add the ground beef and cook for 5–7 minutes, breaking it apart with a spoon or spatula, until browned and fully cooked. Drain excess fat if needed.
Reduce the heat to medium-low. Add the chili powder, cumin, oregano, garlic powder, salt, black pepper, and tomato paste.
Pour in the water and stir everything together until the seasonings and tomato paste are evenly distributed.
Continue cooking for 3–5 minutes, stirring occasionally, until the taco meat thickens and becomes saucy.
Warm the tortillas according to the package directions.
Spoon the seasoned beef into the tortillas and top with lettuce, cheese, tomatoes, and red onions.
Serve the Ground Beef Tacos warm with your favorite taco toppings.