Instant Pot Reuben Casserole–with sauerkraut, corned beef and swiss cheese this dish has the flavors from a Rueben sandwich in the form of a one pot dinner.
Stir some liquid from the pot into the sour cream. Stir in the cornstarch as well. Add sour cream mixture to the Instant Pot. Turn to sauté to thicken.
Stir the cheese in.