Grilled Fish with Jalapeno-Lime Butter

adapted from Cooking Light

1/4 c vegetable oil
1/2 c orange juice
3 T lime juice
1 T tequila
1 T grated lime zest
1 T minced jalapeño pepper
1 clove garlic, minced
4 5-oz. fish fillets
1/4 c butter, softened
14 t garlic salt
2 t minced fresh jalapeño
2 t grated lime zest

In a bowl, stir together vegetable oil, orange juice, 3 tablespoons lime juice, tequila, 1 tablespoon lime zest, 1 tablespoon jalapeño pepper, and garlic. Reserve a small amount to use as a basting sauce, and pour the remainder into a shallow baking dish. Place the fish in the dish, and turn to coat. Cover, and refrigerate for 2 to 4 hours, turning frequently. In a small bowl, mix together softened butter, garlic salt, 1 tablespoon lime juice, 2 teaspoons jalapeño pepper, and 2 teaspoons lime zest. Cover, and refrigerate.

Preheat grill for medium heat. Lightly oil grill grate, and place fish on the grill. Cook fish for 5 to 8 minutes per side, or until the fish can be easily flaked with a fork. Baste occasionally with reserved sauce. Transfer to a serving dish, top with jalapeño butter, and serve.