01 - Preheat the oven to 400°F.
02 - Heat olive oil in a large skillet over medium heat. Add the onion and cook for 3 minutes until softened. Add garlic and cook for 1 minute more.
03 - Add ground beef, breaking it apart with a spatula. Cook until browned, about 5-7 minutes. Drain excess fat if needed.
04 - Stir in chili powder, cumin, smoked paprika, oregano, salt, and black pepper. Cook for 1 minute. Add tomato sauce and simmer for 2 minutes until slightly thickened. Remove from heat.
05 - On a large oven-safe platter or baking sheet, spread half of the tortilla chips. Top with half the beef mixture and half of both cheeses. Layer the remaining chips, beef, and cheese.
06 - Bake for 8-10 minutes, until cheese is fully melted and bubbly.
07 - Remove from oven. Top immediately with tomato, black olives, jalapeños, red onion, and cilantro.
08 - Add avocado, then drizzle with sour cream and salsa just before serving. Serve hot.