Besides for the prominent "Masala Steak plus 2L Sparletta" in the photo, you'll notice several signs advertising Gatsbys (Gats-bea) - a common meal bought at small shops like these ones, near the castle, at the top of the Grand Parade (map). A Gatsby is similar in a way to a Subway sub, but filled with hot chips (French fries), various meats (often sausages), perhaps some salad, and certainly plenty of sauces.
Don't expect eating a Gatsby to be easy - it's large, very messy, yet surprisingly and delightfully tasty. :)