First you have to hunt out some good corn chips with are gluten free at your supermarket (do not be fooled - sometimes wheat makes its way into the flavoring or the chip itself).
Once you find some corn chips you need.
Tomatoes (2)
Red onion (1/2 Diced)
Coriander (fresh)
Lemon (juice of one lemon)
Garlic (1/4 teaspoon diced)
Mix and allow to marinate in the lemon juice for a few hours (even better the next day).
This is also amazing on pizza's, baked potatoes, toasted sandwiches, in wraps.... just about anything.
The secret is the fresh coriander.