Having worked near the Yonge/College area for years, I've always complained about a lack of decent lunch options for those times where I've forgotten to bring something in, yet still want to eat something delicious.
After moving out of the area for a while and recently returning, I was surprised to find Sliced on Yelp -- a sandwich shop that prides itself on providing food options that're preservative-, additive- and hormone-free.
I didn't QUITE understand how the menu worked at first (better signage could help here), but I soon realized that they have a rotating menu of hot sandwich options and what seemed to be a more fixed list of cold ones available for take-away. You're not going to find much space to dine in (a counter with some stools), but if you're an espresso drinker or like finer desserts (like macarons, for example), it's worth sticking around to enjoy the food and the relaxed atmosphere.
Can't say that my wallet could take visiting constantly to this hipster's haven, but when I need something delicious to nosh on that's not going to punish my stomach later, I know where to come. (I had the shrimp and avocado -- DELISH.)