It's hard to make leberkase at home because it's all but impossible without the use of a Stephan cutter. The ice cannot be properly incorporated without one. And, unless you're seriously into charcuterie, that's not likely something you'll own.
Theoretically, you could do it in small batches in a food processor. But it would be difficult, I believe, to keep everything cold enough.
There's a recipe and instructions in the about to be released The Art of Charcuterie, written by John Kowalski and the Culinary Institute of America, published by John Wiley & Sons, 2011.
FWIW, here are the ingredients:
cure mix:
2 tsp Insta Cure #1
3 1/4 oz kosher salt
3/4 oz dextose
spice blend:
1/2 oz ground white pepper
1/4 oz Colman's dry mustart
1/2 oz onion powder
1 tsp ground ginger
1 1/2 tsp ground mace
5 lb boneless beef shoulder, cleaned, cut into 1-inch cubes
4 lb pork jowl fat, cut into 1-inch cubes
3 lb crushed ice
5 3/4 oz nonfat dry milk.