Beef and Beef Heart burgers
Stick some fresh beef heart in a food processor and process until you get a fine grind. I use the spinning lawn-mower-like knife thingy in the bottom of the container (not the round blades at the top).
Mix the ground heart into the ground beef, and cook how you will. Makes really beefy tasting burgers.
We mix it at (but not more than) 1/2 lb ground heart added to 1 lb of ground beef. Yummm...