Preheat grill to medium and line with foil. Brush both sides of bread slices with olive oil. Grill bread on one side until lightly toasted with grill marks, about 2 minutes. Arrange nectarines and cheese on the grilled side of the bread slices; return tartines to grill. Grill, covered, 2 to 3 minutes more. Drizzle sandwiches with honey and vinegar, season with salt and pepper, and serve with salad or chips.
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.