Add diced tomatoes, red onion, cilantro and jalapeño to a bowl. Add lime juice and salt. Stir gently until combined. Taste the salsa and adjust the salt if needed. Let it rest while preparing the taco filling.

Heat olive oil in a large skillet over medium heat. Add the chopped onion and cook for three minutes. Add minced garlic and stir for another minute. Cook until the onion becomes soft and fragrant.

Add ground beef to the skillet. Break it apart with a wooden spoon while cooking. Continue until the beef is browned and no longer pink. Drain excess grease if necessary before adding the seasonings.

Sprinkle chili powder, cumin, paprika, oregano, salt and black pepper over the beef. Stir thoroughly to coat the meat. Add water and simmer for three minutes. The seasonings should create a moist and flavorful taco filling.

Heat a clean skillet over medium heat. Warm each tortilla for about 20 seconds per side. Keep warmed tortillas covered with a clean kitchen towel. This helps them stay soft and flexible while you prepare the tacos.

Place warm tortillas on serving plates. Add a generous spoonful of seasoned beef to each tortilla. Top with lettuce, cheese, avocado and fresh salsa. Finish each taco with a fresh lime wedge for extra brightness.

Arrange the tacos with extra salsa and lime wedges around the plates. Serve while the filling remains warm. Encourage everyone to squeeze lime over their tacos before eating. The fresh citrus adds a delicious final touch.