“Everyone grew up hearing about the love story between Frida Kahlo and Diego Rivera,” chef Santiago Lastra tells the room full of diners in the upstairs restaurant of London’s Tate Modern museum, who have just emerged from viewing Frida: The Making of an Icon. “They were the epitome of cool to a Mexican teenager.”
It’s an interesting way to open a meal, particularly given that much of Tate’s exhibition is dedicated to separating Kahlo away from her toxic and…

