Wash
spinach and drain well. Cook in a pot with the water
clinging to the leaves, just until tender and wilted.
Drain and squeeze out any remaining water. Chop finely.
Combine
mayonnaise, sour cream, and soup mix. Add chopped spinach
and stir to combine. Refrigerate for at least 3 hours.
Cut
the top off of one of the pumpernickel loaves. Scoop
the bread out of the centre of the loaf, so you are
left with a bowl. Cut the scooped out bread, and the
second loaf of bread, into bite sized pieces.