In a small bowl, mix melted butter, garlic, parsley, and a pinch of salt. Let sit for 1–2 minutes to infuse.
Place the bread flat on a cutting board. Using a knife, make 4 cuts from each side toward the center, stopping before cutting all the way through. Leave the center intact.
Gently press the center down slightly and nudge each section inward to create a windmill shape and a shallow well.
Spread the garlic butter evenly over the bread, making sure it gets into the cuts.
Carefully crack the quail egg into the center. Season with salt and red pepper flakes.
Air fry at 350°F (175°C) for 4–5 minutes, until the edges are golden and the egg is just set.
Serve immediately, optionally topped with extra parsley.