apple pie recipe filling

Ingredients: 6-8 medium apples (such as Granny Smith, Honeycrisp, or Fuji), peeled, cored, and sliced 1/2 cup granulated sugar 1/4 cup brown sugar, packed 2 tablespoons all-purpose flour 1 teaspoon ground cinnamon 1/4 teaspoon ground nutmeg 1/4 teaspoon salt 1 tablespoon lemon juice 1 teaspoon vanilla extract (optional)