Prep the pan: Heat the oven to 400°F (205°C). Line a large sheet pan with parchment for easy cleanup.
Cook the protein: Warm a skillet over medium heat with olive oil.
Add onion and cook 3–4 minutes until soft. Stir in garlic for 30 seconds.
Season: Add ground turkey or chicken. Cook, breaking it up, until no longer pink, 5–7 minutes.
Sprinkle in chili powder, cumin, smoked paprika, oregano, salt, pepper, and red pepper flakes. Stir 1–2 minutes to bloom the spices. Taste and adjust salt.
Warm the beans and corn: Stir black beans and corn into the meat mixture and cook 1–2 minutes until heated through.
Remove from heat.
Build the first layer: Spread half the chips on the sheet pan. Top with half the meat-bean mixture and half the shredded cheese.
Build the second layer: Add remaining chips, then the rest of the meat-bean mixture and shredded cheese. This double-layer method keeps every bite loaded.
Bake: Place in the oven for 6–8 minutes, until the cheese is melted and edges are lightly golden.
Finish with fresh toppings: Remove from the oven.
Sprinkle with queso fresco or cotija (if using), tomato, jalapeños, cilantro, and green onions. Add avocado last to keep it fresh.
High-protein sauce swap: Dollop Greek yogurt over the nachos or serve it on the side with salsa or hot sauce. Squeeze lime over the top right before serving.
Serve immediately: Nachos are best hot and crisp.
Bring the pan right to the table and let everyone dig in.