Raspberry-Rhubarb Monte Cristo Sandwiches

Perfect for breakfast, brunch, or dessert, these slightly crisp, butter-fried, tart-at-the-center sandwiches are a snap to assemble if you have the filling chilled and ready to go before you start assembling them. Tangy, ruby-pink stalks of rhubarb combine with raspberry jam for a cool, sweet-and-sour filling that seeps into the heart of the feathery-light brioche. The panko, or Japanese bread crumbs, give these sandwiches a crisp, flaky crunch that serves as a delightful counterpoint to th