Store dover sole fillets in your freezer until you're ready to use them.
How to Defrost Food for Best Quality & Safety
Dover sole is best grilled or pan-fried and served simply so that its subtle flavor and fluffy texture can be appreciated. For example, a classic preparation is Sole Meunière, where the fish is served with butter, lemon, and parsley. It also pairs well with flavors like basil, red wine, and mustard (used sparingly). Dover sole fillets can also be lightly breaded and baked.
Fish Fillet Recipes & Techniques