In a large bowl, whisk salt, cinnamon, baking soda and baking powder. Set aside.
In a separate bowl, combine starter, oil and sugar with an electric mixer for three minutes, increasing gradually to high speed. Add applesauce and apricot jam, then mix on high for one minute until smooth.
Add dry ingredients to wet mixture until fully incorporated. Batter will be clumpy.
Fold in apples and mix on low speed. The batter will be thick. Pour into prepared pan.
Bake 60-70 minutes, or until toothpick inserted in the center comes out clean. Rotate cake pan halfway through baking. Turn Bundt cake onto a cooling rack as soon as it is removed from the oven.
Warm apricot jam in microwave for 10-15 seconds. When cake is cool, dust with powdered sugar and drizzle with warm apricot jam.