Here's Tien's secret: "I like to make a chicken pho base, and my secret is to make sure I roast the chicken bones and toast the spices before adding it to the stock to build an extra layer of flavor." ...

"It's okay to start with a standard chicken broth or use a pho bouillon base mix to start the flavor," he says. "I also like to start it before going to bed and [let] it simmer overnight.