Put the following in a large bowl:

3 1/2 cups flour
2 1/2 c. sugar
1 c. cooking oil
4 unbeaten eggs
1/2 tsp. salt
1/3 c. orange juice
2 1/2 tsp. vanilla
3 tsp. baking powder

Beat all ingredients until smooth. Mix together in another bowl:

3 cups apples, peeled, cored and sliced
2 tsp. cinnamon
3 tbsp. sugar

Spread apple mixture over cake.

Bake at 350°F. for about 40 minutes, or until cake tests done.