In a medium bowl, cream together the butter and sugar substitute. Mix in water, vanilla and egg. Sift together the flour, bicarb soda and salt; stir into the creamed mixture. Mix in the chocolate chips and pecans. Drop biscuits by heaping teaspoonfuls onto a baking tray.
Bake in the preheated oven for 10 to 12 minutes. Remove from baking trays to cool on wire racks. These biscuits freeze well.