Summer late-afternoon snacks or after-dinner indulgences are sorted with this silky-smooth, zesty and fruity slice. A crunchy, thick graham-cracker crust base topped with lip-smacking lemon and blueberry filling creates a perfect balance of sweet and sour. This treat is also incredibly simple to make, requiring only a handful of ingredients. The reaction of the lemon juice in condensed milk naturally thickens the mixture to result in a refreshing filling that is a cross between lemon curd and cheesecake (minus the cheese). Use raspberries instead of blueberries for an equally delicious result.