It might not be the best looking for most attractive place in Ottawa, but it still manages draws a crowd. How, you may ask? Answer:Their famous sandwiches! There's a reason why Dirienzo is so popular in Ottawa. It combines everything someone wants when they just want to get a quick bite to eat: fast service, inexpensive and most importantly good.
Although it is important to note that not only do they sell sandwiches here, it is what they are mainly known for. There is also a series of pastas to choose from. Going back to the sandwiches though, they are $5 goodness. I liked going for the #10 with marbled cheese.