Preheat the griddle on medium-high. Add oil and place corned beef on the griddle to achieve a quick crisp.
Separately, add sauerkraut to the griddle and toss until warm.
Build your sandwich - spread Thousand Island dressing on the inside of the bread, layer corned beef, Swiss cheese, sauerkraut, and pickles.
Add butter to the griddle, place the sandwich on top, press it with a spatula, and pour water around the edges. Cover with a dome and let the cheese melt for about 3-4 minutes.
Flip the sandwich and allow the other side to brown.
Remove the Reuben from the griddle, slice, and enjoy with an extra side of Thousand Island dressing. Don't forget the green beer!
