01 - Combine diced tomatoes, red onion, jalapeño, cilantro, lime juice, salt, and pepper in a mixing bowl. Mix thoroughly and set aside to allow flavors to meld together.
02 - Heat olive oil in a large skillet over medium heat. Add chopped onion and sauté for 2–3 minutes until softened. Stir in minced garlic and cook for 30 seconds until fragrant.
03 - Add ground beef to the skillet, breaking it apart with a spatula. Cook until browned and cooked through, approximately 5–7 minutes. Drain excess fat from the pan.
04 - Sprinkle chili powder, cumin, smoked paprika, salt, and black pepper evenly over the beef. Stir to coat the meat completely with spices. Cook for 1 additional minute, then remove from heat.
05 - Heat mini tortillas in a dry pan or microwave until warm and pliable, taking care not to overheat or dry them out.
06 - Spoon a small portion of seasoned beef onto each tortilla. Top with shredded cheddar cheese, lettuce, and a generous spoonful of fresh salsa.
07 - Add sour cream or avocado slices if desired for extra richness and flavor.
08 - Arrange mini tacos on a serving platter and serve immediately while warm for best results.