In a heavy bottomed saucepan heat the oil over a medium heat. Add the popping corn kernels and toss evenly in the oil.
Stir occasionally until the corn starts to pop. Cover the pan and reduce the heat until the popping stops.
Turn out the popcorn onto a baking sheet, finely grate the cheese evenly, sprinkle with the chilli powder and sea salt.
Place under the grill for 2-3 minutes, watching carefully that it doesn’t burn, until the cheese is melted. Allow to cool slightly so the cheese firms up and enjoy!