As a rule, I don't think of Spain as being a haven for us veggies. On a work experience exchange in Catalonia when I was 16, I worked in a hotel. I can still remember the smell of the full legs of ham at breakfast and the disdain of one of the cooks, who didn't want to cook me 'something special' when he put together lunch for the staff.
However, keeping an open mind (my work experience in Girona was a long time ago) and convinced that I'd seen a blog post on Madrid from one of the veggie bloggers I follow, I arrived in Spain's capital feeling hopeful.