For each sandwich, use 2 slices bread, one-sixth of the turkey slices, one-third
cup sauerkraut and 2 slices cheese.
Assemble sandwiches by spreading one side of each bread slice with mayonnaise.
On six bread slices, layer turkey, sauerkraut and cheese. Cover with remaining bread
slices, mayonnaise side down. Spread top bread slice evenly with softened butter;
place buttered side down in skillet. Butter other bread slice. Cover; grill slowly
on each side.