Storage: Best served immediately. Leftover fish can be refrigerated for up to 2 days in an airtight container.
Substitutions: For the dace recipe, you can use freshwater trout or pike, but the trout must have white rather than pink flesh. If white fish is unavailable, cod or haddock works well.
Tips: Ensure the oven dish for the salmon is made of thin metal that conducts heat quickly for even cooking.
Variations: The pistou can be eaten hot or cold. To heat it, whisk it while it warms over a low heat.