from the oven and let it rest for about 10 minutes.
This allows the layers to settle and makes the casserole easier to scoop.
The three-ingredient version is wonderfully simple, but a few small additions can turn this humble bake into an even richer comfort-food dinner.
Why Russet Potatoes Work Well
Russet potatoes are a good choice because they contain plenty of starch and become soft and fluffy when baked.
They absorb some of the savory flavor released by the corned beef and onion while still holding together enough to
