Easy Friday night supper and, bonus, I had too much meat so made double and froze the other 2 for another day.
To make 4 burgers:
500g good beef mince. 1 large onion, grate half and very finely chop the other half. Approximately 70g blue cheese, roughly chunked. I happened to have Gorgonzola left from the chicken recipe a few days ago. As much freshly ground black pepper as you like.
Mix together well, really squeeze the ingredients together and shape into ...