I was first introduced to lemon bars when I reviewed Secret teenage chef's "Easy Lemon Bars". They were delish, but I was determined to make them gluten free as well as sugar free.The flavor combination of fresh lemon and raspberry are what make these deliciuos little treats... Sugar free jams are available, but can be quite expensive and yet so easy to make, my own has just three simple ingredients "Wicklewood's Sugar free Raspberry jam".