Prepare the Beef:

• Preheat your oven to 400°F (200°C).
• In a large skillet, heat olive oil over medium heat. Add the chopped onion and cook until softened, about 3-4 minutes. Add the minced garlic and cook for an additional 1 minute.
• Add the ground beef to the skillet, breaking it up with a spoon. Cook until browned and cooked through. Drain any excess fat.
• Stir in the taco seasoning and cook according to package instructions. Mix in the black beans and set aside.

2. Assemble the Nachos:

• On a large sheet pan, spread a layer of tortilla chips evenly.
• Spoon the beef and bean mixture over the chips, spreading it out evenly.
• Sprinkle the shredded cheddar and Monterey Jack cheeses on top of the beef and bean mixture.

3. Bake the Nachos:

• Bake in the preheated oven for 10-15 minutes, or until the cheese is melted and bubbly.

4. Add Toppings:

• Remove from the oven and immediately top with diced tomatoes, black olives, sliced jalapeños, and chopped cilantro if desired.
• Serve with sour cream, salsa, and guacamole on the side.

Tips for Success:

• Layering: Ensure even layering of chips, beef, and cheese for consistent flavor and texture.
• Cheese: Use a combination of cheeses for a richer flavor and better melt.
• Avoid Soggy Nachos: If making ahead, keep the beef and bean mixture separate from the chips until ready to bake to prevent sogginess.