Add onion and chillies to oil in a frying pan. Saute until onions are translucent and beginning to caramelise

Add frozen sweetcorn and cover with hot water. Season with salt. Boil until water has evaporated and sweetcorn is cooked (more water can be added if necessary)

Add a teaspoon (or more 😋) of butter and fry a bit longer until some kernels start popping about and then serve.

You can also add two teaspoons of chilli powder followed by a little more butter before you stop cooking. This will just add some more heat. Or add the lemon juice.