Modern-day Reuben sandwiches are often open-faced and broiled, which dries out the corned beef and makes the cheese rubbery. Or, under the misguided belief that more is better, they are overstuffed. The main things to remember for a great Reuben are to keep the filling under control and in balance, so when you bite into it you get a harmonious and succulent mouthful; and to grill the sandwich slowly and under some pressure, so the bread gets toasty brown and buttery crisp, the meat gets…
