Ingredients

  • six 5- by 2 1/2-inch graham crackers
  • 1 1/4 cups coarsely crushed amaretti* (Italian almond macaroons, about 3 ounces)
  • 3 tablespoons sugar
  • 3 tablespoons unsalted butter, melted
  • 1 1/2 cups mascarpone cheese* (about 3/4 pound) at room temperature
  • 1/2 cup sugar
  • 2 large eggs
  • 1 tablespoon fresh lemon juice
  • 2 teaspoons freshly grated lemon zest
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon almond extract
  • 3 tablespoons all-purpose flour
  • 1/4 teaspoon salt
  • 2 pounds nectarines (about 8)
  • 2 tablespoons sugar, or to taste
  • *available at specialty foods shops and some supermarkets

Method

  • Preheat oven to 350F.
  • and lightly butter a 9-inch springform pan.
  • In a food processor finely grind graham crackers and amaretti with sugar.
  • Add butter and blend until combined well.
  • Press mixture onto bottom and about 3/4 inch up side of pan.
  • Bake crust in middle of oven 10 to 15 minutes, or until crisp and golden, and cool completely in pan on a rack.
  • In a bowl with an electric mixer beat mascarpone with sugar until smooth and add eggs, 1 at a time, beating well after each addition.
  • Beat in lemon juice, zest, and extracts.
  • Beat in flour and salt until combined well.
  • Pour filling into crust.
  • Bake tart in middle of oven 30 to 35 minutes, or until pale golden and set, and cool completely in pan on rack.
  • Remove side of pan and transfer tart to a plate.
  • Chill tart, covered, at least 4 hours and up to 24.
  • Slice nectarines and in a bowl toss with sugar.
  • Let nectarines stand, tossing occasionally, until sugar is dissolved and juices are released, about 5 minutes.
  • Mound topping on tart and serve immediately.