Add both potatoes to a medium saucepan, cover with cold water and season well with salt. Bring to a boil over medium-high heat. Reduce the heat to medium and simmer until fork-tender, about 10 minutes. Drain well.
Meanwhile, heat the butter in a small skillet over medium heat until the bits at the bottom of the skillet are deep brown, about 7 minutes. Remove from the heat.
Transfer the potatoes to a ricer in batches and rice into a medium bowl. Add the butter, cream, vanilla seeds, lemon zest and 3/4 teaspoon salt and mix well with a rubber spatula to combine.
Heat the oil in a small pan over medium heat until hot. Add the prosciutto and cook, stirring often with a slotted spoon, until crispy and golden brown, about 3 minutes. Remove to a paper towel-lined plate to drain.
Transfer the mashed potatoes to a serving bowl and sprinkle with the crispy prosciutto before serving.
Tools You May Need
Tools You May Need
Price and stock may change after publish date, and we may make money off
these links.