or any vegetable oil
rinsed and drained
cooked and thinly sliced
In nonstick pan or skillet over medium heat, cook sauerkraut and onion until softened, 4 to 6 minutes.
Butter 8 slices light rye bread.
Combine mayonnaise, relish and ketchup, spread over unbuttered side of half of the bread.
Top with sauerkraut mixture, turkey and Swiss cheese.
Press remaining bread over top, buttered side out.
Broil on baking sheet turning once, until golden and cheese melts, or you can use toaster oven, 4 to 6 minutes.