Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9x13 inch baking dish.
Whisk sugar into vegetable oil in a mixing bowl. Beat eggs, vanilla extract, salt, flour, and baking soda into the sugar mixture, one ingredient at a time, in that order. Fold apple slices into the batter; pour into the prepared baking dish.
Bake in the preheated oven until a toothpick inserted into the center comes out clean, 40 to 50 minutes.
Delicious Apple Cake · Dinner Match Lab | Dinner Match Lab