There are many Thai option in Newmarket and Aurora and this is one of my favourites.
The family that runs this shop is very attentive and sweet. I always opt for the lunch menu $11.99 and it comes with an entree, a spring roll and a hot and sour soup.
I had the pad thai - which I believe is authentic. It is the perfect balance of sweet and sour. You can really taste the authentic-ness from the wok fried pad thai.
Hands down they have some of the best spring rolls as well :)
I sometimes also get the red curry with chicken and rice which is flavourful as well. The dish is a blend of curry and coconut milk - delicious!