Preheat your oven to 425°F. While it heats, prepare your toppings: slice the jalapeno into thin rings, chop the cilantro, and have your pico de gallo ready in a bowl. Measure out the sour cream into a small bowl for easy drizzling. Arrange the tortilla chips in a single layer on a large baking sheet, spreading them out so they cook evenly—this ensures every chip gets crispy and warm.
Heat a large skillet over medium-high heat and add the ground turkey, breaking it apart as it cooks. Cook for about 5 minutes until the turkey is no longer pink and has started to brown slightly. Once cooked through, add the cumin, garlic powder, onion powder, salt, and black pepper, stirring well to distribute the spices evenly throughout the meat. I like to cook the spices directly into the warm meat for about 30 seconds—this blooms their flavors and prevents a raw spice taste.
Stir the black bean dip into the cooked seasoned turkey until fully combined and the mixture is warm throughout. This creates a rich, flavorful base that adheres to the chips better than dry meat alone.
Spread the turkey-bean mixture evenly over the chips on your baking sheet, working in sections so the distribution is fairly even. Sprinkle the freshly shredded Mexican cheese blend generously over the top—I use fresh-shredded cheese rather than pre-shredded because it melts much more smoothly without the anti-caking agents. Bake for 6 minutes until the cheese is completely melted and bubbly around the edges.
Remove the baking sheet from the oven and let it cool for just 30 seconds so the toppings don't wilt. Scatter the pico de gallo over the nachos first, then drizzle with sour cream in a thin stream across the top. Finish with the fresh cilantro and sliced jalapenos distributed generously. Serve immediately while the cheese is still warm and melted.