I was up at the Co-op on my way back from my walk and treated myself to one of their fancy sandwiches. Aberdeen Angus beef and caramelised onion. Very tasty but at £4.75 just buy them occasionally.
Tesco do those in their Finest range(or did, don't know if still do). Beef, Stilton and caramelised onion. Really nice and I used to buy on way into work sometimes.