Season the chicken: Season the chicken breasts with salt, pepper, and optional garlic powder. If they’re thick, slice them horizontally or pound thin for even cooking.
Air fry the chicken: Preheat air fryer to 375°F (190°C). Place chicken in a single layer. Air fry for 8–10 minutes, flipping halfway, until lightly golden and just cooked through.
Brush with pesto: Remove the chicken briefly and brush the tops generously with basil pesto. The heat melts the pesto slightly, releasing its fresh basil aroma.
Add cheese to create the “melt”: Place a slice of mozzarella (or shredded cheese) over the pesto. Ensure it covers the top evenly for the perfect melty finish.
Return to air fryer: Increase heat to 400°F (200°C). Air fry for 2–4 minutes, or until cheese is melted, bubbly, and lightly golden.
Let rest: Allow the melts to rest for 2–3 minutes so the cheese sets and the layers hold together beautifully.
Serve & enjoy: Serve warm with cozy sides like Carrot and Parsnip Soup, spicy veggie bites like Hot Honey Cauliflower, or refreshing drinks like Spiced Pear Smoothie.