Rinse fish thoroughly in cold water; pat dry. Place fish, skin side down, on a 15- x 10- x 1- inch jellyroll pan; sprinkle fish with olive oil. Bake at 375° for 30 minutes or until fish flakes easily when tested with a fork. Remove fish to a warm serving platter; keep warm.
Combine egg yolks and flour in a medium saucepan; mix well. Gradually add butter, stirring until smooth. Add remaining ingredients; mix well. Cook over medium heat 3 minutes, stirring occasionally. Pour sauce over prepared fish, and serve immediately.