Mash salmon, bones and all, in a bowl with a fork.
Add onion, egg, salt, pepper and dill (if used).
Blend well.
Crush soda crackers and add to the salmon, mixing well.
Add just enough crumbs to make a mixture that will hold its shape.
Make patties and dip each in flour or more cracker crumbs to coat both sides.
Heat oil in a heavy skillet.
Add patties and fry slowly until golden on both sides.
Drain excess oil on paper towel and serve.
