Place fennel, oil, zest and lemon juice in a shallow dish; season with salt and pepper. Let stand 10 minutes. (Meanwhile, grill or broil bread slices, if serving.) Just before serving, arrange fennel salad on a large platter. Scatter burrata and mint over fennel. Drizzle with additional olive oil, if desired.
Before her diagnosis, Caroline wrote a book on cakes called Cake Magic!. She started developing a birthday cake using her gluten-free mix found in that book. Check out other recipes she’s developing for her new life—and the stories behind them—on her blog, The Wright Recipes. Her next book, Catalan Food, written with chef Daniel Olivella, comes out in early September from Clarkson Potter.