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Make-Ahead Mashed Potato Casserole

This comforting dish takes mashed potatoes to the next level.

Serves 8
Ready in 60 mins
Prep time 20 mins
Cooking time 40 mins
343 calories per serving


> 4 lbs russet potatoes
> 1 (0.75 oz) pkg fresh chives
> 1 bunch green onions
> 1 stick (4 oz) unsalted butter
> 1 cup low-fat sour cream
> 1 cup shredded cheddar
> 2 oz sliced prosciutto (optional)


Preheat the oven to 350°F. Peel, quarter, and boil the potatoes for about 15 min., or until just cooked. While potatoes cook, finely chop the chives and green onions, set aside. Drain the potatoes and return to the pot.
In a microwave-safe bowl, melt the butter. Add to the potatoes and mash coarsely. Add the sour cream, salt, and pepper. Mash until smooth, taking care not to overwork the potatoes, or they will become starchy. Stir ¾ of the chopped chives and green onions into the mashed potatoes, along with the shredded cheese. Spoon the mixture into a casserole dish. At this point, you can bake the casserole, or cover and chill it until later.
If using the prosciutto, chop and scatter the pieces over the potatoes. Bake casserole for 20 min. (30 min. if using straight from the refrigerator). Sprinkle the remaining green onions and chives over the casserole and serve.

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