Preheat oven to 180 degrees C. Grease baking trays.
In a large bowl, cream together the butter, apple sauce, brown sugar and white sugar until light and fluffy. Add the eggs one at a time, beating well with each addition, then stir in the vanilla. Combine the flour, salt and bicarb soda then gradually stir into the creamed mixture. Finally, stir in the oats, raisins, nuts and chocolate chips. Drop by rounded spoonfuls onto the prepared baking trays.
Bake for 8 to 10 minutes in the preheated oven. Allow biscuits to cool on baking tray for 5 minutes before removing to a wire rack to cool completely.