Billy Bakery & Cafe is tucked in a plaza where Bruno's, Maxim and Yang's are located. It is a Hong Kong style bakery plus Hong Kong style tea cafe. It used to be called Vienna Bakery & Cafe. In fact, the Chinese name remains as the Chinese translation of Vienna, but the English name has changed (see pictures). Based on Vienna's reviews on Yelp, the name change may have happened in end of 2012 / beginning of 2013.
We ordered an eggplant and minced pork hot pot and a stir fried mushroom with beefs. Both entrees came out momentarily; I meant they literally came out within 5 minutes of ordering, leading me to believe that they were pre-made. They were hot and ready nevertheless. The beef stir fry strangely became a hot pot (I double-confirmed with the menu later that it was supposed to be a stir fry). It was very tasty. The Chinese name of the eggplant and minced pork entree implied that fish sauce was one of the ingredients. Both my dining mate and I could not taste any hint of fish sauce. The dish was still tasty but it lacked that little bit of fish sauce taste.
The most striking impression of the entrees was that they tasted like "really good" food court food. I mean they taste like the food from Yan's Cook food booth of First Markham Place, minus the excessive oil, except Yan's will use fish sauce in the eggplant hot pot.
I am giving it 2 stars because the stir fry has become a hot pot without any hint from the menu or the waitress, which was a disappointment. Otherwise, it is a solid HK cafe that is worthy of 3 stars.