Ingredients

  • 3 1/4 lbs russet potatoes, peeled and cut into 1-inch pieces
  • 4 garlic cloves, peeled
  • 1/2 cup butter
  • 3 1/2 ounces thinly sliced prosciutto
  • 3/4 teaspoon fresh rosemary, minced
  • 3/4 cup whole milk
  • 1 cup freshly grated parmesan cheese
  • fresh rosemary (to garnish)

Method

  • Cook potatoes and garlic in a large pot filled with boiling, salted water until potatoes are very tender, about 15 minutes.
  • Drain, return potatoes and garlic to the same pot.
  • Meanwhile, heat 1/2 cup butter in heavy small saucepan over medium heat.
  • Add chopped prosciutto and 3/4 teaspoon minced rosemary.
  • Saute until fragrant, about 2 minutes.
  • Add prosciutto mixture and 3/4 cup milk to potatoes and garlic.
  • Mash well, adding more milk by tablespoonfuls if potatoes are too dry.
  • Mix in 3/4 cup parmesan cheese.
  • Season with salt and pepper.
  • Transfer to a large serving bowl.
  • Sprinkle with remaining 1/4 cup parmesan cheese.
  • Garnish with additional fresh rosemary, if desired.