Is there anything I can substitute eggs for when making meatloaf?
In Sweden, breadcrumbs or porridge oats are sometimes used as an alternative to egg for binding köttbullar (meatballs). The crumbs or oats are mixed with boiling water and left for a while until you have a porridge-like consistency and then mixed into the ground meat.

Unfortunately I don't know the exact ratios of dry ingredient/water/ground meat since I generally use both egg and breadcrumbs. I would guess somewhere between 4 tablespoons and half a cup of dry ingredient for a pound of meat.