Tartine's passion fruit bavarian
I've been very slowly making my way through some recipes in the Tartine cookbook. I want to make the passion fruit and lime bavarian cake but I have no idea what they mean by "passion fruit puree." Do I get some passion fruits and puree them or is there some packaged product I can just buy? I'm in San Francisco so I figure I should just be able to track down Tartine's source for passion fruit. Help!