Preheat oven to 325 degrees. Spray and flour bundt pan(s). In the bowl of a stand mixer fitted with the paddle attachment, combine the oil, sugars, eggs and vanilla extract. Mix until everything is incorporated. In a smaller bowl, combine the flour, cinnamon, baking soda, nutmeg and salt. Add the dry ingredients to the wet mixture and give it a stir. Fold in the apples and pecans (if using).
Pour batter into the prepared pan and bake for 1 1/2 hours. If using 2 smaller pans, you will need to adjust the time - the mini one took about 45 minutes and my thinner bundt pan took 1 hour and 15 minutes. When your toothpick comes out clean, it's done.
Let cool for 10 minutes, then gently slide a butter knife down the sides of the pan to loosen the cake. Flip upside down onto plate or cake stand.
Make the caramel glaze by combining the brown sugar, half & half, butter and salt in a medium saucepan; heat over medium heat until everything is melted and combined. Let cool to room temperature then whisk in confectioner's sugar. Drizzle over the top of the cake. Cut into slices and serve room temperature.
https://simplycleanandfitmom.com/2013/10/caramel-apple-bundt-cake/(Source: adapted from Sugar ‘n Spice Gals)