Mix with the flake salt. Heat a frying pan over medium heat and add half the butter. Season the fillets with the lemon pepper and fry for just 1-2 minutes on each side until nearly cooked through.
Heat the remaining milk and butter in a medium-sized pot ... with a whisk until thickened, like a white sauce. Cook for 1 minute until glossy and cooked through. Pour over the chilled crust and spread ...