Add diced tomatoes, red onion, jalapeño and cilantro to a bowl. Pour in fresh lime juice and add a small pinch of salt. Stir gently until everything is combined. Set the salsa aside while you prepare the beef.

Heat olive oil in a large skillet over medium heat. Add the chopped onion and cook for two to three minutes. Add the minced garlic and stir for another thirty seconds. Keep the heat moderate to prevent burning.

Add the ground beef to the skillet with the softened onion. Break the beef apart using a wooden spoon. Cook until browned and no longer pink. Drain excess grease if needed, then return the beef to the skillet.

Sprinkle cumin, chili powder, paprika, salt and black pepper over the cooked beef. Stir everything thoroughly and cook for another two minutes. The spices should coat the beef evenly and create a warm, savory aroma.

Heat a clean skillet over medium heat. Warm each tortilla for about twenty seconds on each side. Keep the tortillas soft and flexible. Place the warmed tortillas under a clean kitchen towel until you are ready to serve.

Place a warm tortilla on each serving plate. Add a spoonful of seasoned beef down the center. Top with shredded lettuce and cheddar cheese. Finish with a generous spoonful of fresh salsa for extra flavor.

Fold the tortilla gently around the filling and serve immediately. Add fresh lime wedges on the side. Squeeze lime over the beef and salsa just before eating. Enjoy while the tortillas are still warm and soft.