Create a marinade using the following:

1 tablespoon tequila

1/2 tablespoon salt

1 tablespoon paprika

2 teaspoons fresh lime juice.  (None of that bottled stuff.)

2 teaspoons olive oil

1/2 teaspoon cayenne pepper. 

Marinade for 4-6 hours. ( Cook on grill in aluminum foil in the marinade and make sure its sealed)

Works for 4-6oz fillets.  Beacuse of the paprika and cayenne pepper the fish will be very red. (No worries)