“The rule is, jam to-morrow and jam yesterday—but never jam to-day.” – Lewis Carroll, Through the Looking Glass. My homemade English muffins seemed to cry out for some rich red raspberry jam so I went for it – my first stab at canning. I didn’t have much to go on but I thought, This is jam – how hard can it be, right? Just mix equal parts sugar and fruit, with some lemon juice thrown in, and boil away.