Czech Squares

INGREDIENTS

• 1 1/2 sticks butter, diced and slightly chilled
• 1 cup cherry jam
• 5 large egg yolks
• Pinch fine salt
• 2 tablespoons brandy
• 1/2 teaspoon ground cinnamon
• 3/4 cup granulated sugar
• 1 tablespoon lemon juice
• 1/2 lemon, zest finely grated
• 1 cup walnut pieces
• 1/4 teaspoon ground nutmeg
• 2 1/2 cups all-purpose flour
• 1/8 teaspoon ground clove
• Filling
• 1 egg white, for brushing