01 - Preheat oven to 400°F.
02 - Heat olive oil in a large skillet over medium heat. Add ground beef and cook for 5-7 minutes, breaking apart with a spoon, until browned and cooked through.
03 - Stir in cumin, chili powder, paprika, garlic powder, onion powder, salt, and pepper. Cook for 1-2 minutes until fragrant. Remove from heat.
04 - Spread tortilla chips evenly over a large oven-safe platter or baking sheet.
05 - Top chips with seasoned ground beef, then sprinkle shredded cheddar and Monterey Jack cheeses evenly over the surface.
06 - Bake for 7-10 minutes until cheese is completely melted and bubbly.
07 - Remove from oven. Scatter diced tomato, red onion, jalapeño slices, black olives, cilantro, and avocado over the hot nachos.
08 - Top with dollops of sour cream. Serve immediately while hot and crispy.