In a bowl, combine the dry ingredients (flour and salt), and mix thoroughly.
In another stainless steel bowl, combine the water and yeast, using spatula, then the oil, mix well. Let rest for 5 minutes.
Pour the water into the center of the flour, and with a spatula, stir to combine well into a sticky mass.
Pour this mass out onto a lightly floured surface and begin to knead the dough until dough is free of stickiness.
Brush another stainless steel bawl with oil. Place the ball of dough in it. Cover with a clean cloth and let rise at room temperature until it has doubled in size.
When it has risen in the size, punch down the dough, and divided into two balls. Roll each ball onto the floured surface, then top it with any kinds of topping you like.
Topping A: Combine everything as one, set aside
Topping B: Melt margarine and saute apple with the rest of the ingredients, set aside.
Topping C: Combine everything as one, set aside
Spread topping A on the crust, then followed with B and top with C
Bake on 375 F for about 30 minutes.
Please take note that the recipe for topping is for half crust only.