Preheat oven to 375°F.
In a medium size mixing bowl, combine the flour, salt, and margarine.
Continue by adding the oil and mix together well.
Note : It will be dry.
Next add the water, 1 Tbsp at a time, mixing after each Tbsp.
The dough should clean the sides of the bowl.
If the dough seems to dry, add 1 to 2 Tbsp. of oil, mixing well after each to make sure not to over moisten. Do not add more water.
Once the dough is combined, form it into a ball.
Then place the ball onto a floured surface.
Continue by cutting the ball in half and place half of the ball back in the bowl.
Roll out half the dough ball, thin enough to cover the bottom and slightly up the side of a 13x9 pan.
Carefully place the rolled out dough into the 13x9 pan.
Next peel and dice the fresh apples, spread the apples evenly, covering the bottom of the dough.
Frozen apples or thawed apples will work just as well, or mix both the fresh and frozen/thawed apples.
In a small bowl, mix together sugar and cinnamon, sprinkle the sugar mixture over the apples.
Remove the other half of the dough from the bowl and place onto the floured surface and roll it out, enough to cover the apples.
Carefully place the dough onto the apples, seal the edges, and cut slits on the top, so that the seam escapes while baking.
Before baking, brush a little oil on the top of the crust to prevent the crust from drying out.
Slide the dish into the oven and bake the bars for 50 minutes.
Notice : The apples have formed their own sauce and the crust has slightly browned.
Remove from the oven and let the bars cool for a few hours.
Once the bars are completely cool, it is time to frost them.