St. Patty's Day Leftover Corned Beef Casserole

Step 1
Preheat oven to 350 degrees F (175 degrees C).

Step 2
Grease a 2-quart casserole dish.

Step 3
Heat butter in a skillet over medium heat until bubbly.

Step 4
Cook and stir onion in the melted butter until browned, about 8 minutes. Set onion aside.

Step 5
Stir corned beef, chili sauce, and mayonnaise together in a bowl.

Step 6
Spread sauerkraut in the bottom of the prepared casserole dish.

Step 7
Spoon corned beef mixture on top of sauerkraut.

Step 8
Sprinkle cooked onions on top of corned beef mixture.

Step 9
Top onions with 1/2 cup Swiss cheese.

Step 10
Cover casserole dish with aluminum foil and place in preheated oven. Bake 30 minutes.

Step 11
Cut individual biscuits in half. Remove casserole from oven and place halved biscuits on top of casserole. Bake until biscuits are lightly golden brown, about 18 minutes.

Step 12
Sprinkle remaining 1 cup Swiss cheese on top of casserole. Return to oven and bake until cheese is melted, 3 to 5 minutes.