Wash plums; remove and discard pits. In blender or food processor, puree half of plums with 2 eggs 3/4 cup sugar until well blended. Pour into a large bowl. Repeat with remaining plums, eggs and sugar. Combine with previously pureed mixture. Stir in lemon juice and half and half. Pour into ice cream canister. Freeze in ice cream maker according to manufacturer's directions. Makes 2 quarts.