St. Paddy's Day Leftover Corned Beef Casserole

Step 1
Preheat oven to 350 degrees F (175 degrees C). Grease a 2-quart casserole dish.

Step 2
Heat butter in a skillet over medium heat until bubbly. Cook and stir onion in the melted butter until browned, about 8 minutes. Set onion aside.

Step 3
Stir corned beef, chili sauce, and mayonnaise together in a bowl.

Step 4
Spread sauerkraut in the bottom of the prepared casserole dish.

Step 5
Spoon corned beef mixture on top of sauerkraut. Sprinkle cooked onions on top of corned beef mixture. Top onions with 1/2 cup Swiss cheese.

Step 6
Cover casserole dish with aluminum foil and place in preheated oven. Bake 30 minutes.

Step 7
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 8
Sprinkle remaining 1 cup Swiss cheese on top of casserole. Return to oven and bake until cheese is melted, 3 to 5 minutes.