01 - Preheat your oven to 400°F (200°C).
02 - Spread the tortilla chips evenly across a large baking sheet or serving board, ensuring it's lined with parchment paper for easy cleanup.
03 - Distribute the drained black beans and finely diced red onion uniformly over the tortilla chips.
04 - Generously shower both shredded cheddar and Monterey Jack cheeses over the entire surface.
05 - Place the baking sheet in the preheated oven and bake for 10-12 minutes, or until the cheese is completely melted and bubbly.
06 - While the chips are baking, combine the diced tomatoes, sliced jalapeño, diced bell pepper, and diced avocados in a separate bowl. Drizzle with olive oil, then season with salt and pepper to your preference.
07 - Carefully remove the baked chips from the oven. Spoon the prepared fresh vegetable mixture evenly over the melted cheese.
08 - Top the assembled board with pickled red onions, fresh chopped cilantro, and a liberal scattering of the crushed mini pretzels, creating the "confetti" effect.
09 - Present the Nacho Party Board immediately, accompanied by lime wedges, salsa, and sour cream on the side for individual customization.