Preheat oven to 325℉
Spray a 10-inch tube pan (or bundt pan) with baking spray and set aside. (If you don't have baking spray, butter and flour the pan instead.)
In a medium bowl, combine the diced apples, walnuts and raisins. Add 2 Tbsp of the flour from your measured amount and toss to coat evenly. Set Aside
In a large bowl, combine remaining flour, salt, baking soda, cinnamon, and nutmeg. Set aside.
In a large mixing bowl, beat the butter, granulated sugar, and brown sugar together until light and fluffy
Beat in eggs, one at a time, mixing well after each addition.
Mix in the vanilla extract.
Gradually add the dry ingredients (flour and spices) to the butter mixture, mixing on low speed just until incorporated. The batter will be thick.
Using a spatula, fold in the apples, walnuts, and raisins until evenly distributed in the batter
Spoon the batter into the prepared pan, smoothing the top. Bake at 325℉ for 1 hour and 15 minutes, or until a skewer inserted in the center comes out clean.
Allow the cake to cook in the pan for 10 minutes, then turn it out onto a wire rack to cool completely.