- 2 tablespoons olive oil
- 1/2 cup onion, diced small
- 1/4 cup shallots, diced fine
- 1/4 teaspoon crushed celery seed
- 1/4 teaspoon crushed caraway seed
- 1/4 pound sliced deli corned beef, cut into small pieces
- 1/4 pound sliced deli black pastrami or extremely lean red pastrami cut into small pieces
- 1/2 cup cream (half and half or light cream)
- 8 ounce package cream cheese
- 1/2 cup mayonnaise
- 2 tablespoons ketchup
- 1 tablespoon dill relish
- 1 tablespoon sweet pepper relish
- 1 cup well drained and squeezed sauerkraut
- 2 cups shredded Gruyere Swiss cheese, divided
- 1/2 cup shredded sharp cheddar cheese
- 12 slices of marble rye or pumpernickel bread
- 6 tablespoons melted butter