Mix the sugar, orange juice, canola oil, eggs and vanilla together. Beat at high speed for 10 min with electric mixer.
Sift together the flour, baking powder and salt. Add a little at a time to batter mixture. Fold the nuts into the batter mixture.
Pour 1/3 of the batter into a bundt pan. Place 1/2 of the sliced apples evenly on top of batter; sprinkle 1/2 of the sugar/cinnamon over apples. Add another 1/3 of the batter and repeat with remaining apples and sugar/cinnamon mixture. Cover with remaining batter.
Bake for 1 hour at 350 degrees.
Remove from pan and place onto a plate immediately to cool.