It makes about 8 good size matzo balls, so of course you'll want to multiply everything by at least five.
1/2 cup matzo meal
2 eggs, slightly beaten
2 Tbsp schmaltz (or vegetable oil)
1 tsp salt
1/4 tsp pepper
2 Tbsp seltzer
Mix ingredients and refrigerate for 30 minutes. With wet hands, roll into a ball (roughly the size of a golf ball) and drop into a big pot of well-salted boiling water. Simmer, covered, for 40 minutes.