John Dory is a fish that chefs like because it doesn’t have strong flavours and can blend well with other ingredients. It's up to you how you want to cook your fish. You can grill it, pan-fry it or poach it.
Rinse the Oreo Dory fillets under cold water and pat them dry with paper towels
Season both sides of the fillets lightly with 1/2 teaspoon salt
Set aside the fish fillets on a plate
In a saucepan, add 1 cup water, 1/2 cup white wine, 2 peppercorns, 1 bay leaf, 1 chopped onion, 2 tablespoons chopped celery, 1 1/4 teaspoon thyme, and 1 1/2 teaspoon tarragon
Bring the mixture in the saucepan to a simmer over medium heat
Simmer the aromatic poaching liquid for 5–7 minutes to allow the flavors to infuse
With a slotted spoon, remove the bay leaf and peppercorns from the liquid
Gently add the seasoned Oreo Dory fillets to the simmering poaching liquid, ensuring the fish is partially submerged
Reduce the heat to low and poach the fillets for 7–9 minutes, or until they are just cooked through and opaque
While poaching, prepare lemon wedges for serving
Once cooked, gently remove the fillets from the liquid with a slotted spatula
Allow excess liquid to drain off the fillets for a few seconds
Arrange the Oreo Dory fillets on warmed plates
Drizzle a little of the strained poaching broth over the top for moistness
Garnish each plate with a lemon wedge
Serve immediately, pairing with lightly steamed greens or a simple salad if desired