Heat the oil over medium heat in a large pot (that you have a lid for). Add 2 or 3 of the popcorn kernel into the o.il
When the popcorn kernels pop, add the rest of the popcorn kernels, put the lid on the pot and reduce the temperature to low. The popcorn should start popping, give the pot the odd shake, and leave it on the low heat until the popping slows, this should only take a couple of minutes.
Turn off the heat, remove the lid and allow the popcorn to cool.
In a small bowl combine the parmesan, salt, onion powder and mustard powder.
Once the popcorn is cool, add the parmesan cheese popcorn seasoning mix to the pot and shake well so that all the popcorn is well seasoned.