01 - Heat vegetable oil in a large skillet over medium heat and sauté chopped onion until translucent, about 2–3 minutes.
02 - Incorporate minced garlic and cook for 30 seconds until fragrant.
03 - Add ground beef, breaking it up with a spatula, and cook until browned, approximately 5–6 minutes. Drain excess fat if necessary.
04 - Sprinkle chili powder, ground cumin, smoked paprika, oregano, salt, and black pepper over the beef mixture and stir well to combine.
05 - Pour in tomato sauce, stir thoroughly, then reduce heat and simmer for 3–4 minutes until thickened. Remove from heat.
06 - Heat tortillas in a dry skillet or microwave until pliable and warm.
07 - Spoon beef filling onto each tortilla. Top with shredded lettuce, cheddar cheese, diced tomatoes, red onion slices, sour cream, salsa, and garnish with cilantro leaves.
08 - Present tacos with lime wedges on the side for squeezing.