Creating oven-baked nachos is a breeze when you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Baking Sheet: Lightly grease a baking sheet with olive oil or cooking spray.
3. Layer Chips: Spread a layer of tortilla chips evenly on the baking sheet.
4. Add Cheese: Sprinkle half of the shredded cheese over the chips, ensuring even coverage.
5. Add Toppings: Evenly distribute the black beans, diced tomatoes, and jalapeño slices over the cheese.
6. Top with More Cheese: Add the remaining cheese on top of the toppings for that extra gooeyness.
7. Bake: Place the baking sheet in the preheated oven and bake for 15-20 minutes, until the cheese is melted and bubbly.
8. Remove and Cool: Once done, carefully remove the nachos from the oven and let them cool for a minute.
9. Add Fresh Toppings: Top with diced avocado, green onions, and fresh cilantro.
10. Serve: Serve with sour cream and salsa on the side for dipping.

These straightforward steps will lead you to create mouthwatering oven-baked nachos that everyone will love!