Step 1: Preheat the oven and prepare the pan.

Preheat your oven to 350°F (180°C) and grease a 9x13-inch baking pan with cooking spray or butter.

Step 2: Mix the dry ingredients.

In a large mixing bowl, whisk together the flour, baking soda, cinnamon, nutmeg, and salt until well combined.

Step 3: Mix the wet ingredients.

In a separate bowl, beat the sugar, vegetable oil, eggs, and vanilla extract with an electric mixer until creamy and smooth.

Step 4: Combine the wet and dry ingredients.

Gradually add the dry ingredients to the wet ingredients, mixing well after each addition. Fold in the diced apples, chopped walnuts, and raisins.

Step 5: Bake the cake.

Pour the batter into the prepared pan and bake for 45-50 minutes, or until a toothpick inserted into the center of the cake comes out clean.

Step 6: Make the caramel glaze.

While the cake is baking, make the caramel glaze. In a saucepan, melt the butter over medium heat. Add the brown sugar and milk, stirring constantly until the sugar is dissolved. Bring the mixture to a boil and let it cook for 2-3 minutes, stirring occasionally. Remove from heat and stir in the vanilla extract.

Step 7: Glaze the cake.

Once the cake is done, remove it from the oven and let it cool for 10 minutes. Then, poke holes all over the cake with a fork and pour the warm caramel glaze over it, spreading it evenly with a spatula. Let the cake cool completely before slicing and serving.