Place the fish fillets on a baking sheet and season with salt and pepper to taste.
Bake the fillets in a preheated oven for 15 minutes. Remove and cool.
Flake the cooled fish with a fork and place in a medium-size bowl.
Add the lemon zest, dill weed, Old Bay seasoning, mayonnaise, sweet pickle relish and garlic powder to the fish and mix well.
Cover and chill for at least two hours.
Use the spread for crackers as an appetizer, or as a sandwich filling.
Notes
Store in an airtight container in the refrigerator for up to 5 days. Not recommended for freezing as the texture of the mayonnaise with split and become watery.