Spread the corn out on a small baking sheet or bottom of a baking dish, and toast under an oven or a grill just until beginning to colour, stirring frequently.
Mix with the lime juice and the diced chile and let stand covered for a few hours. Refrigerate if you are planning to serve it much later.
Notes
If you have access to fresh coriander leaves, toss a few chopped ones in.Watch the corn closely; don't let it go hard and horrible.