- 2 cups blanched hazelnuts, toasted , cooled (about 10 ounces)
- 1 1/4 cups all purpose flour, divided
- 2 teaspoons unsweetened cocoa powder
- 1 teaspoon ground cinnamon
- 3/4 teaspoon salt
- 1/4 teaspoon (generous) ground cloves
- 14 tablespoons (1 3/4 sticks) unsalted butter, room temperature
- 1 1/4 cups sugar
- 1 large egg
- 1 large egg yolk
- 2 teaspoons finely grated orange peel
- 1 cup apricot preserves
- 2/3 cup chilled heavy whipping cream
- 1/3 cup whole-milk quark or Greek-style yogurt
- Powdered sugar
- Preheat oven to 375°F. Butter 10-inch springform pan. Process nuts and 1/4 cup flour in processor until nuts are finely ground. Transfer to medium bowl. Whisk in 1 cup flour, cocoa powder, cinnamon, 3/4 teaspoon salt, and cloves. Using electric mixer, beat 14 tablespoons butter and 1 1/4 cups sugar in large bowl. Beat in egg, then egg yolk and orange peel. Gradually stir in dry ingredients. Spoon 1 1/2 cups batter into pastry bag fitted with 3/8-inch plain round tip. Spread remaining batter in pan.
- Bake torte bottom until golden, about 35 minutes. Cool in pan on rack 10 minutes. Maintain oven temperature.
- Using some of batter in pastry bag, pipe border around edge of torte bottom. Spread preserves evenly over torte bottom. Pipe remaining batter over preserves in lattice pattern, 5 to 6 strips in each direction. Bake until lattice is firm to touch and preserves are bubbling, about 40 minutes. Cool completely. DO AHEAD: Can be made 3 days ahead. Store airtight at room temperature.
- Beat cream in bowl until peaks form; beat in quark. Dust torte with powdered sugar. Serve with quark whipped cream.
- A slightly tangy, soft unripened cow's-milk cheese; available at some supermarkets and at specialty foods stores (such as Whole Foods markets) and natural foods stores.