How to make the perfect no-bake cheesecake

The perfect combination of rich-but-not-overly-so topping and crunchy base is very hard to get right. So what is the secret to this cheater’s cheesecake?When I was growing up in the 80s, cheesecake came in two varieties: half defrosted from a Sara Lee packet – for special occasions – or served (not quite often enough) in enormous refrigerated slabs at school.Both were topped with a vividly gloopy fruits-of-the-forest mix, but, where Sara’s was dense and painfully sweet, e