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Serves : 6

This sformato—an irresistible mashed-potato gratin—isn't on the menu at Anacleto and Tina Bleve's Bottega del Vino is Rome's Jewish Quarter. (The specialty there os involtini— cold cuts and cured fish rolled around endless combinations of fillings.) You have to know to ask for it.    Delicious, Quick Side Dishes  

How to Make It

Step 1    

Preheat the oven to 425°. Butter a 7-by-11-inch baking dish. In a saucepan, cover the potatoes with water and bring to a boil over moderately high heat. Salt the water and cook the potatoes until tender, about 12 minutes; drain. Shake the potatoes over moderately high heat until very dry. Remove from the heat.

Step 2    

Mash the potatoes, stirring in the milk. Season with salt and pepper. Fold in the mortadella and mozzarella, then spread the potatoes in the prepared baking dish. Dot the top with the butter and bake in the upper third of the oven for about 12 minutes, or until bubbling. Turn on the broiler and broil for about 2 minutes, or until crusty and browned on top. Let rest for 5 minutes before serving.

Make Ahead

The sformato can be assembled in the baking dish and refrigerated overnight. Bring to room temperature before baking.

Suggested Pairing

A supple, fruity and velvety red will mirror the creamy texture, cut through the richness and highlight the smoky mortadella in this dish.

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