Heat the oven to 375 degrees. Line a large rimmed baking sheet with parchment paper.
Pulse the almonds in a food processor until finely ground. Add the cottage cheese, 1/4 cup of the sour cream, 1/4 cup of the sugar and almond extract; process until almost smooth.
Place the pie dough in the center of the parchment paper and spread with the almond mixture to within 2-inches of the edge.
Toss the apples in a medium bowl with the remaining 3 tablespoons sugar, flour, cinnamon and nutmeg. Arrange the apples over the almond mixture. Fold the dough up around the apples, pleating as necessary.
Combine the milk and remaining 1 teaspoon sour cream in a small cup. Brush over the dough and sprinkle with sparkling sugar.
Bake for 45 to 50 minutes or until the crust is golden brown and the apples are tender. Cool on a wire rack to room temperature before serving.