Poach fish filets in boiling water seasoned with salt and lemon juice, bay leaf and thyme for 15 minutes.
Make sauce:Â
2 T butter
3 T flour
1 1/2 cups fish stock
1 onion minced
1 cup cooked shrimp, broken into pieces
6 mushrooms sliced
1/2 cup crab meat
2 egg yolks
Make sauce by adding butter to saute pan, add flour and minced onion. Saute until brown, then add fish stock, stirring constantly to make a smooth sauce. Add shrimp, crab, mushrooms. Remove from heat and stir in egg yolks.
Place each filet on individual parchment paper, divide sauce placing spoonfuls on top of filets. Fold parchment so each filet is encased in its own separate bag.
Bake at 400 degrees for 10 minutes.