Short Answer:

Toppings can be added either before or after air frying, depending on their type. Hard or cooked toppings like cheese, beans, or jalapeños can be added before cooking so they melt or warm with the nachos.

Delicate or fresh toppings such as tomatoes, avocado, guacamole, sour cream, or herbs should be added after air frying to prevent sogginess or burning. Proper timing ensures crunchy chips and flavorful toppings.

Detailed Explanation:

Adding Toppings Before Air Frying

Some toppings benefit from cooking with the nachos. Cheese, cooked meats, or jalapeños can be placed on top of chips before air frying. These toppings heat thoroughly, melt evenly, and blend with the nachos. Air frying helps cheese become gooey and golden while warming other toppings for a cohesive flavor. Using toppings that can tolerate heat prevents burning or soggy texture.

Adding Toppings After Air Frying
Delicate toppings like diced tomatoes, fresh herbs, avocado, guacamole, or sour cream should be added after air frying. Adding them before can cause moisture to release during cooking, making chips soggy. Fresh toppings also risk burning under hot air, affecting flavor and appearance. Adding them after cooking maintains crispiness and preserves freshness.

Combination Method
For best results, combine both methods. Add sturdy toppings like cheese or cooked vegetables before air frying and finish with fresh, delicate toppings afterward. This approach provides melted, flavorful ingredients while maintaining the crisp texture of the chips and freshness of delicate additions.

Timing and Placement
Place toppings evenly over chips. For multiple layers, add a light sprinkle of cheese or toppings on each layer for even cooking. Avoid overcrowding, which can prevent hot air circulation and lead to uneven melting or soggy sections. After air frying, add final toppings carefully to keep nachos visually appealing and flavorful.

Serving Tips
Serve immediately after air frying and adding fresh toppings. Delays can allow residual heat to soften chips or overcook delicate toppings. Pair with dipping sauces as desired for additional flavor. Immediate serving ensures a balance of crispiness and topping freshness.

Conclusion:

Toppings can be added before or after air frying depending on their heat tolerance. Cooked or sturdy toppings are added before, while delicate or fresh toppings are added after. Using both methods preserves crispiness, enhances flavor, and ensures visually appealing, delicious nachos.