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.
02 - Heat olive oil in a large skillet over medium heat. Add finely 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 apart with a spatula. Cook for 5–7 minutes until browned and cooked through. Drain excess fat.
04 - Sprinkle chili powder, cumin, smoked paprika, salt, and black pepper over the beef. Stir to coat evenly and cook for 1 additional minute. Remove from heat.
05 - Heat mini tortillas in a dry skillet or microwave until pliable and warm.
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 - Finish with sour cream or avocado slices if desired.
08 - Arrange mini tacos on a serving platter and serve immediately while warm.