Love love love Levetto!!
I first discovered Levetto at the Waterloo location and I have been in love with this franchise ever since. The portions are humongous for a super affordable price ($10-14 approx). The Toronto locations are not full service but more half service since you order at the counter and then either get take out or stay in at one of the few tables they have at the location. I would recommend trying to eat at the restaurant if possible as the pastas aren't as good when ordering take out, depending on how far you have to travel before enjoying the food.
I've tried several items on the menu over my numerous visits but my favourites definitely have to be the rigatoni (which is super heavy but so worth it) and the Funghi pizza.
For a lighter option, I would opt for the carbonara but I must warn you, the pastas do tend to be more on the saltier side so beware!
Fingers crossed that they continue to open more locations around the GTA.