Mint sauce is so easy to make yourself and it is syn free. Fresh mint, try growing it in a tub in the garden or on the balcony it is so easy to grow. anyway chop up and add vinegar , mix splenda with a little warm water to dissolve add to mint and chill, thats it, even I can do that. If you buy mint in the tub from the supermarket ,after you have cut off the leaves, plant whats left and it will regrow, might not get too much this year but next year you will have a big tub of it and you just pick a few leaves at a time,perfect with fresh baby boiled spuds.