Fresh raspberry jelly

Writing about jelly makes me think of my childhood, a happy fraction of which was spent throwing licked Chivers jelly cubes on to the ceiling, where they would stick fast. Oh happy days! No such luck with this recipe, I’m afraid, as it is made with fresh fruit. Mint and raspberries always go well together, even in this crème de menthe-splashed version, which has a slightly ghoulish colour combo.