01 - Preheat the oven to 400°F (200°C).
02 - Heat olive oil in a large skillet over medium heat. Add finely chopped onion and minced garlic; cook until softened, about 2 to 3 minutes.
03 - Add ground beef to the skillet, breaking it apart with a spoon. Cook until browned and fully cooked, approximately 5 to 6 minutes.
04 - Stir in ground cumin, chili powder, smoked paprika, salt, and freshly ground black pepper. Cook for an additional 2 minutes then remove from heat.
05 - Spread tortilla chips evenly across a large baking tray or ovenproof dish. Distribute the cooked beef mixture evenly over the chips.
06 - Scatter grated cheddar and Monterey Jack cheeses over the beef layer. Top with sliced jalapenos, spring onions, and diced tomato.
07 - Place the tray in the preheated oven and bake for 8 to 10 minutes, until the cheese has melted and is bubbly.
08 - Remove nachos from the oven, sprinkle chopped fresh coriander if using, and serve immediately accompanied by sour cream, salsa, and guacamole.