Tater tot casserole is a meal all by itself. It is a very filling dish that does not require being paired with anything else. However, adding a side salad would be a good choice to add some vegetables into this meal for balance purposes. Another great option would be adding some steamed broccoli or cauliflower to the side for some extra vegetables. For drink choices, try a glass of Cabernet Franc. The fruit and acidity in a Cabernet Franc would pair well with the cream sauce flavor of the dish. A glass of chardonnay would also pair nicely with this dish. If reds are preferred, then a lighter red such as a Pinot Noir would pair nicely. An ice-cold beer would also go very well with this dish.