The banana custard Mullerlights are very handy for making almost-free trifle as they are just about the most custardy thing you can get for a free food:
Put strawbs in sugarfree jelly at the bottom, chill for a bit.
Couple of mullerlights on top with added gelatin if you fancy tinkering, chill for a bit.
Whipped/vanilla-ed/sweetened FF fromage frais on top.
Scoff the entire bowl for under 2 syns!!
You can prob make it completely free if you use plain gelatin with colouring/flavouring and sweetener instead of a sachet of crystals, but it's more long-winded. Anybody know why gelatin is free and sugarfree jelly is synned when they are basically the same thing?