Prep a large baking sheet by lining with tinfoil
In a large bowl mix the salt and eggwhites and form a sand like mixture.
Add peppercorns, some chopped dill, lemon zest
Place a handful of salt mix down and flatten to form a base for the fish to be put on
Lay down fish on salt, stuff with above ingredients
Cover fish with rest of salt, packing down around the fish
Bake at 450°F for 30-35 minutes
Salt crust will be hard. Chip a line around fish form, you should be able to pop off crust leaving the fish all pretty underneath.
