01 - Heat 1 tbsp vegetable oil in a large skillet over medium heat. Add the finely chopped onion and cook for 3 minutes until softened. Add minced garlic and cook for 1 additional minute until fragrant.
02 - Add ground beef to the skillet and cook, breaking it apart with a spoon, until browned and cooked through, about 7 minutes.
03 - Stir in chili powder, ground cumin, smoked paprika, dried oregano, cayenne pepper, salt, and black pepper. Cook for 1 minute until the spices are fragrant and evenly distributed.
04 - Add tomato paste and mix well to coat the beef. Pour in the beef broth and simmer for 3 to 4 minutes, stirring occasionally, until most of the liquid is absorbed and the filling is saucy but not watery. Remove from heat.
05 - Heat about 1 inch of vegetable oil in a deep skillet or heavy-bottomed pot over medium-high heat. Using tongs, carefully place each tortilla in the hot oil, fold in half to form a taco shell shape, and fry for 1 to 2 minutes per side until crisp and golden. Drain on paper towels.
06 - Fill each crispy shell with the seasoned beef mixture and sprinkle generously with shredded cheese while still warm so it melts.
07 - Top with shredded lettuce, diced tomato, sliced jalapeños, diced red onion, sour cream, fresh cilantro, and salsa to taste. Serve immediately with lime wedges on the side.