Instead of cooking fish in butter, use a little chicken broth. It is less fattening.
By mamacrafter from TN
This page contains the following solutions.
In a small bowl, combine soy sauce and lemon juice. Pour 1/4 cup marinade in a resealable plastic bag, and add fish. Seal bag and turn to coat. Refrigerate for 20 minutes. Cover and refrigerate remaining marinade.