I have no idea. But they are amazing chefs with years of experience and much more creativity and talent than I have. My husband reminds me when I don’t do his recipes correctly (but they often taste great anyway— Stuffed Sole).
I actually haven’t eaten their food, but would love to… I do have a Boulud cookbook. I tried getting in to French Laundry in Napa, but couldn’t. Maybe one day I could get in to Per Se or Daniel, they’re closer to me.