Instructions
Step 1 Spread butter evenly on one side of each slice of rye bread./nStep 2 On the unbuttered side, spread Thousand Island dressing and Dijon mustard if using./nStep 3 Layer one slice of Swiss cheese, followed by corned beef, sauerkraut, and the second slice of Swiss cheese./nStep 4 Top with the second slice of bread, buttered side facing outward./nStep 5 Heat a skillet over medium heat and place the sandwich in the pan./nStep 6 Cook for 3–4 minutes on each side, pressing gently, until the bread is golden brown and the cheese is melted./nStep 7 Remove from heat, let rest for a minute, then slice in half and serve warm.
Storage and Reheating Tips
Reuben sandwiches are best enjoyed fresh, but leftovers can be wrapped tightly and refrigerated for up to 1 day.
Reheat in a skillet over medium heat to restore crispiness.
Avoid microwaving as it can make the bread soggy.
If preparing ahead, store ingredients separately and assemble just before cooking for best results.
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