01 - Preheat the oven to 400°F for baking the nachos.
02 - Heat olive oil in a large skillet over medium heat. Add chopped onion and sauté for 2–3 minutes until softened and translucent.
03 - Add minced garlic and cook for 30 seconds until fragrant. Add ground beef and cook, breaking it up with a spoon, until browned thoroughly, about 5–6 minutes.
04 - Stir in chili powder, smoked paprika, cumin, cayenne pepper, salt, and black pepper. Cook for 1 minute to bloom 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. Evenly distribute half the beef mixture, half the cheddar cheese, and half the Monterey Jack cheese over the chips.
07 - Add the remaining tortilla chips, beef mixture, and cheeses. Sprinkle fresh jalapeño slices and pickled jalapeños evenly over the top.
08 - Bake for 8–10 minutes until the cheese is fully melted, bubbly, and beginning to brown slightly around the edges.
09 - Remove from oven. Top with diced tomatoes, black olives, and chopped cilantro. Drizzle sour cream over the top or serve on the side.
10 - Serve immediately with lime wedges on the side for squeezing over the nachos.