Here is the result... I attempted to cook it tonight for my dad and me.
I put "burger buns" on the shopping list for him to pick up and he managed to get a bit confused and picked up hot cross buns instead :s He didn't realise hot cross buns were sweet and thought they'd be like regular burger buns...
Anyhoo... I managed to find some mini buns at the back of the freezer and that's why our burgers are about 2 and half inches wide (how cute is that?).
I plopped on some slices of applewood smoked cheese (the only hamburger cheese) and served with lettuce and ketchup. Neato.
In the end we've decided that, even though vegans have the best food, it would be hard to eat vegan all the time since I would miss eggs and milk and fish and my boyfriend would miss... uh... steak.