I like California Sandwiches and Seoul House. If you try Seoul House, it's possible you'll smell like Korean bbq after leaving the restaurant, not that there's anything wrong with that.
Camarra is also nearby.
2899 Dufferin St, Toronto, ON M6B3S7, CA
3220 Dufferin St., Toronto, ON , CA
2700 Dufferin St, Toronto, ON M6B4J3, CA
Not RIGHT near Yorkdale but I like the Columbian bakery on Dufferin south of Lawrence in the same plaza as Lady York Foods. The name escapes me right now. Don't expect sit down service. It's more of an order at the counter and grab a seat kind of place.
Lady York Foods
2939 Dufferin Street, Toronto, ON , CA