01 - Combine diced tomatoes, red onion, jalapeño, cilantro, lime juice, salt, and black pepper in a medium bowl. Mix thoroughly and set aside to allow flavors to meld for at least 15 minutes.
02 - Heat olive oil in a large skillet over medium heat. Add finely diced onion and cook for 2-3 minutes until softened and translucent. Add minced garlic and sauté for 30 seconds until fragrant.
03 - Add ground beef to the skillet. Cook while breaking apart with a spatula until evenly browned, approximately 5-7 minutes. Drain excess fat if necessary.
04 - Stir in tomato paste, chili powder, cumin, smoked paprika, dried oregano, salt, black pepper, and cayenne. Mix thoroughly to coat the meat evenly with spices.
05 - Pour in water and stir well. Let simmer for 2-3 minutes until the mixture is juicy but not watery. Taste and adjust seasoning as needed.
06 - Heat tortillas in a dry skillet over medium-high heat for 15-20 seconds per side until warm and pliable, or microwave in damp paper towels for 30 seconds.
07 - Spoon seasoned beef into each warm tortilla. Top with shredded cheese, lettuce, generous pico de gallo, and avocado slices. Serve immediately with lime wedges.