Cut the corn: Remove the husk and silk completely from the corn. Trim off both ends so the cob sits flat and steady. Place the corn on a sturdy chopping board. Using a large, sharp knife, carefully press the blade into the centre of the cob lengthwise. Apply firm, steady pressure and slice down slowly. Once cut in half, place each half flat-side down and slice again lengthwise to create rib-like strips.
In a bowl, combine melted butter, salt, red chilli powder, chilli flakes, cumin powder, grated garlic, and chopped coriander. Whisk until smooth and evenly mixed.
Add the corn pieces to the bowl and toss well, making sure every piece is evenly covered in the spiced butter mixture.
Arrange the corn ribs on a baking tray lined with parchment paper (or place them in an air fryer basket) with the kernel-side facing up. Bake at 180°C for about 20 minutes, or until tender and slightly crisp at the edges.
Transfer to a serving plate, brush with a little extra melted butter, and sprinkle generously with grated parmesan. Serve hot.