Here's what I did:
2 cups of leftover mashed potatoes
In a small 6 inch cast iron skillet:
Saute 1 green onion, 1/2 jalapeno, 1/2 red pepper for just a minute or two in a pat of butter. Add that to the potato/egg mixture.
1/2 cup shredded cheddar cheese.
Wipe out the cast iron skillet and add the entire mixture back into the skillet.
Bake in 350 degree oven for about 25 to 30 minutes.
Notes: This turned out so yummy and I would make this for a brunch. I served with chopped up green onions and I had some black olives in the fridge that I put on the table with it along with some grapes on the side. Nice combo of sweet, salty & a little spicy with the jalapenos.