Reuben Sandwich - With beef

2 tablespoons butter , softened 8 slices rye bread 8 slices swiss cheese 3/4 lb corned beef brisket , thinly sliced 1/2 lb sauerkraut 1/4 cup Russian salad[...]

3 tablespoons unsalted butter 1 onion , finely chopped 1 cup cooked ham , finely chopped 1 1/2 cups corned beef , finely chopped 1/2 garlic clove , crushed 2[...]