Dark Chocolate Grilled Parmesan Cheese Sandwich

I've posted many recipes for Chocolate Grilled Cheese Sandwiches, but I recently came across a new one, and it's fabulous. As always, experiment, but I had to share this recipe since tomorrow is Grilled Cheese Day. As always use the very best ingredients! Please don't use Parmesan from the can--either grate your own or buy it at a specialty shop where it's just been grated. Recently I've been favoring a Wisconsin Parmesan--not too salty and fabulous flavor. And, of course a good Parmesan/Reggiano would be great in this Grilled Cheese Sandwich!

Dark Chocolate Grilled Parmesan Cheese Sandwich

Ingredients
4 slices brioche or sweet sourdough
Butter, for bread
2 Tbsp ricotta cheese
1 1/2 ounces dark chocolate, coarsely chopped
1/4 cup grated Parmesan cheese

Directions
Lightly spread one side of each bread slice with butter. Evenly divide ricotta between two bread slices and then evenly sprinkle the Chocolate and Parmesan over the ricotta. Top with remaining bread slices.
Heat skillet over medium-low heat. Place sandwiches in warm skillet and cook on one side until golden brown and cheese begins to melt, 2 to 4 minutes. Flip sandwich over and cook until golden brown and cheese is completely melted, 2 to 4 additional minutes.
Let cool 2 minutes before cutting in half.