The “old timers” in Maine always eat salmon and peas for their fourth of July family feast. This tradition was started a long time ago when salmon still came “up river to spawn” and people still rushed in the Spring to plant their peas so they would have the first peas of the year, hopefully by the 4th, if the weather was good. (I still have customers that plant their peas in the fall so they sprout when they are ready come Spring.)
The old tradition is to bake a center cut chunk of salmon at 350 degrees till it is less than moist, (so all the relatives like it) than nap it with a white sauce, better known as a béchamel sauce to which you add in chopped hard cooked eggs. And peas, lot of peas cooked with butter, salt, pepper and a little water. The rule of thumb was to cook them till when you blew on a spoonful they wrinkled.