Prepare the taco seasoning by combining chili powder, cumin, garlic powder, onion powder, and a pinch of salt in a small bowl. Set aside.
In a large skillet over medium heat, cook the ground beef until browned, breaking it apart with a spatula. Drain excess fat if necessary. Stir in the taco seasoning and a splash of water, allowing it to simmer for a few minutes until fragrant.
On a large baking sheet, spread an even layer of tortilla chips. Top with refried beans, the seasoned ground beef, corn, sliced olives, black beans, and salsa. Distribute the toppings evenly.
Sprinkle both the mild cheddar and jack cheese generously over the nacho assembly. The more cheese, the better!
Place the baking sheet in the preheated oven and bake for about 10-15 minutes, or until the cheese is completely melted and bubbly.
Remove the nachos from the oven and let them cool for a minute. Top with chopped cilantro, fresh jalapeños, and diced Roma tomatoes.
Serve your Oven Baked Sheet Pan Nachos hot, with sour cream on the side for dipping. Enjoy the delicious combination of flavors and textures!
