Erin's Fine Foods is a great little shop for lunch. Walking from Grant St, I couldn't find this place originally, but it was hidden inside the K&L Gates building so it took me 2 tries until I got it right.
I love that this place always has really fresh food and I'm pretty sure I had the best chicken salad of my life here. They have a daily special which can be worth checking out as well. Even though the lunch can seem a bit pricey ($10+) for what it looks like, the food quality is definitely there and worth it.
Just make sure you hit this place at the right time, or end up waiting for a while (at least 15-20 mins)!