01 - Set oven temperature to 400°F for baking the nachos.
02 - Heat olive oil in a skillet over medium heat. Add chopped onion and cook for 2–3 minutes until softened, then add minced garlic and cook for 30 seconds until fragrant.
03 - Add ground beef to the skillet, breaking it up with a spoon. Cook for 5–6 minutes until fully browned.
04 - Stir in chili powder, smoked paprika, cumin, cayenne pepper, salt, and black pepper. Cook for 1 minute to toast the spices.
05 - Pour in tomato sauce and simmer for 3–4 minutes until the beef mixture is saucy but not watery. Remove from heat.
06 - Arrange half the tortilla chips on a large baking sheet or oven-safe platter. Top evenly with half the beef mixture and half of each cheese.
07 - Layer the remaining tortilla chips, seasoned beef, and cheeses. Sprinkle fresh and pickled jalapeño slices over the top.
08 - Bake for 8–10 minutes until the cheese is completely melted and bubbly.
09 - Remove from oven. Top with diced tomatoes, black olives, and fresh cilantro. Drizzle with sour cream or serve alongside.
10 - Serve the nachos hot with lime wedges on the side for squeezing over the top.