I remember from childhood a corned beef pie that I occasionally make nowadays when I want a comfort food type basic meal. Any spare filling was fried into rissoles, I remember them as being delicious; although served in a traditional flat shape there's no reason they couldn't be formed into balls.
The ingrediants were
Corned beef .... large tin cut into chunks
Potatoes....about 4 large...baking potatoe size
Onion ....1 large ....cut into thick slicies
Carrot ...1 med sized cut into small dice
Worcestor sauce
Egg
Butter
Boil the potatoes, carrots and onions together in salted water, then mash them with the egg and maybe some butter till smooth, but you don't want it to become 'wet', it needs to be on the dry side.
Add the corned beef and mash that in. Then add a, few drops of Worcestor to taste, possibly add some black pepper, that's up to you.
Let the mix cool a little so you can handle it then form into the shape you want. You then put them in the fridge for half an hour so they set into shape before you fry them.
Very simple, but very tasty.