Jam tarts 

Use the recipe for the refined sugar free blueberry jam, then use some shop bought pastry, cut into circles, top with jam, bake at 200c for 20 mins. 
(Really easy to make your own pastry too with just 85g unsalted butter and 170g self raising flour – 

Rub the butter into the flour with your fingers to resemble bread crumbs then drop in some water a teaspoon at a time until the crumbs turn to dough )