Reuben with cream

1 -3 lb corned beef brisket (cooked) 2 cups sauerkraut 2 cups cabbage 4 -6 cups beef stock 1 onion 2 garlic cloves 2 tablespoons Dijon mustard 2 tablespoons[...]

3/4 cup cubed rye bread 2 (10 1/2 ounce) cans cream of mushroom soup 1 1/2 cups milk 1/2 cup finely chopped onion 3/4 lb deli sliced corned beef , chopped or[...]