One thing we have learned is that lamb should not be overcooked, and it likes garlic. We tend to use a heavy dose with all of our recipes. The other ingredient we use with ground lamb is fennel. The Greek and Italian spices work real well with lamb.
Here is our basic 'Lamb Burger' mix.
1 pound ground lamb
1-2 teaspoons ground fennel (to your taste)
3-4 cloves garlic minced
4-6 large fresh basil leaves chopped (if you can get it) or you can try the new product in a tube found in the produce section at the store, it works pretty well.
salt & pepper
When cooking the lamb be careful not to over cook. If the meat is too lean, as it often is, you can add ground pork or other ground meat that contains more fat. We use olive oil in the pan or on the grill to keep it from sticking.Add a slice of cheese near the end of cooking, and yummy what a great burger.