A fun to make dessert, by the way, is sugar free jelly with frozen fruit.
If you can trust yourself, get a largish bowl and make up two sachets of jelly with two sachets of gelatin, so enough to make 4 pints of jelly but use about one pint. If necessary you can put the bowl over a pan of hot water to help the dissolving.
I like the black current jelly and I pour in a whole packet of frozen blueberries. I top up the jelly with up to a pint of cold water so that all the fruit is covered, then stir gently and the give a few gentle shakes. The jelly usually sets before your very eyes. If you are likely to eat the whole lot in one go then making just half the packet of fruit in one packet of jelly and gelatin, or perhaps separating it into small bowls can work, even cutting it into pieces and storing in plastic bags - it is quite firm to handle even though the fruit will be soft once defrosted. The sturdy jelly wraps around and holds it. Serve with thick cream.
I have made the same sort of thing with yogurt and a lime, sliced very finely and simmered for a few minutes in the hot water used to make the lime flavoured jelly - don't worry if it curdles, it is even more interesting if it does. When setting, press the slices of lime into the mixture, and then arrange a few on top.It can be made more interesting by adding desiccated coconut, even making up the jelly with coconut milk, and sprinkling coconut on the top.