TooSso is in a strip mall near Dulles Town Center and has a tiny menu which seems to be lunch-oriented. Most dishes are either rolls in an excellent thin roti or bowls over rice.
I don't know much about Pakistani food, but it was delicious, aggressively spiced, and we will go back for more. This was much hotter than Shiney's in Annandale.
Reshmi Kebab ($4), which is a ground spiced beef in roti.
Zeera Aloo bowl ($4.50), a spiced potato dish over rice
Biryani bowl ($7), Biryani chicken over rice
Pakoras ($2)-vegetable fritters
The pakoras were actually the real standout. Vegetables were shredded thicker than in most Indian versions I've tried and the batter was the lightest I ever recall having in a Pakistani or Indian version. We were really blown away by how delicious this version was.
This is an order at the counter sort of place, with movies being projected on one wall.
They have some weekend specials, including a Pakistani breakfast for $5.
A skinny fridge holds some interesting canned drinks (the Pakistani cream soda is bright green and has "cream soda flavor" ) and there's a soda fountain, but they appear to be booze free.