This is where I go when I'm craving some rolls or biriyani. The prices are decent and standard compared to other Sri Lankan caters. Off the top of my head, 3/$1 samosas, $1 mutton/veggie rolls, $6 for a tub of kotu roti.
It's usually always busy, but the line moves fast. You have to call in ahead of time if you want a large order. The parking lot is at an angle so its kind of hard to get to sometime.
The people in front are billingual in english and tamil and are very knowledgable in the ingredients to help you out if you have doubts.
I wouldn't recommend using your debit card with them, there have been rumors of them taking costs twice.