Measure out the peas and allow them to thaw while preparing the eggs.
Hard boil the eggs. Then run under cool water or submerge in an ice bath to cool.
While eggs are boiling, slice the tomatoes and avocado.
Peel the cooled eggs, discarding four of the yolks. Mash the remaining yolks and chop the egg whites; add to a mixing bowl along with mayonnaise, yogurt, dill, salt, and pepper. Mix well.
Cut open the rolls and layer one side with spinach, 1-2 slices of tomato, a few slices of avocado, and some of the egg mixture. Sprinkle some peas on top, then cover with the other half of the roll.
Slice in half if desired and serve strawberries on the side.