Jay Caspian Kang, the author and narrator of this week’s Sunday Read, spoke with the actor Steven Yeun over Zoom at the end of last year. The premise of their conversations was Mr. Yeun’s latest starring role, in “Minari” — a film about a Korean immigrant family that takes up farming in the rural South. They discussed the usual things: Mr. Yeun’s childhood, his parents and acting career — which includes a seven-year stint on the hugely popular television series “The Walking Dead.” But the topic of conversation kept circling back to something much deeper. Today on The Sunday Read, Jay’s profile and meditation on Asian-American identity.