This cold sauce hails from the Piedmont region of Northern Italy and is best known as part of vitello tonnato, a chilled dish of poached veal topped with this creamy tuna sauce. But tonnato is so quick to make and so versatile you could put it on just about anything – chicken, turkey, poached seafood and about any vegetable (it’s particularly good on sliced tomatoes, asparagus or artichokes). Some recipes start by making a homemade mayonnaise for the base, but prepared mayo is a delicious and time-saving option. Do make sure to use an Italian tuna in oil here, it makes all the difference. If you are serving this with poached meat or poultry, save a little of the poaching liquid and use that instead of the water called for in the recipe for added flavor. The sauce will keep for a few days in the fridge, giving you time to enjoy it in a variety of ways.
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Directions
Combine the tuna, mayonnaise, lemon juice, capers, anchovies and garlic in a food processor. Pulse to make a thick paste. With the machine running, drizzle in 2 tablespoons room-temperature water and process to make a very smooth sauce. The sauce should fall from a spoon in a thick drizzle; if it’s too thick add another tablespoon of water and process again.
Taste and season with salt, if needed, and several grinds of black pepper. (Some of the ingredients are salty so it may not need additional salt.) Transfer to a serving bowl, cover and chill at least 30 minutes before serving. If the sauce thickens as it sits, stir in water 1 teaspoon at a time until pourable.
Serve with the protein or vegetable of your choice and garnish with capers. The sauce will keep refrigerated for up to 3 days.
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