To one piece of sourdough add 1 to 2 tablespoons of pesto depending on the size of your bread. And to the other piece of sourdough add a generous helping of Capanata add 2 slices of prosciutto on one side and 3 slices of provolone cheese on the other cover to allow steam to melt the cheese. When the bread is golden brown and toasted to your liking put the two pieces together to create the sandwich.
Find it online: https://www.tableanddish.com/caponata-grilled-cheese-with-pesto/