They've only been open a month, but I think it might be a Yonge Street Keeper. You really can't beat the $4.99 price for a beef burger. For that price, it was darn good; it had the perfect juicyness and moistness. My stomach didn't feel overly heavy after eating it. Apparently their burgers are a lot healthier than most places and they use extremely high quality product.
The fries weren't half bad either. I have had better elsewhere, but they give you a ginormous portion for just $3.99. Seriously, I should've shared my "small" fries.
The boss guy is so nice and talkative. He took the time to explain what he uses in the burgers and the importance of quality. He seems to really know his stuff and I sense that he is quite experienced with the food/restaurant industry. He was patient with me and my friends as we ordered too.
(Gluten-free people: they offer gluten-free buns)
I will definitely be back :)