Today I bought some mixed beef and pork mince (no horse that I know of) to make some burgers.  As I couldn't find a recipe so made one up:

Beef and Pork Burgers

• 1 lb (500g) mince
• 1 small onion, chopped finely
• 1 egg
• 2 slices of bread, made into breadcrumbs
• seasoning - today I used thyme and a little garlic, salt, pepper mix.

Mix all this together and make into eight burghers, then cook on griddle.  Any unused will happily freeze.
(Note: They fell to pieces a bit on the griddle, so may use two eggs next time)