The reason this dish is called Tomatoes Provencal is because of its traditional Provencal topping. This topping is usually a combination of breadcrumbs, garlic, butter, and parsley, though it can also include other herbs and parmesan cheese. Of course it is delicious on tomatoes, and you can also use it to stuff mushrooms. It’s fantastic on top of a gratin like this White Asparagus Roquefort Gratin. You can also use it to top fish or chicken before baking—you might try it instead of panko in this Panko-Crusted Salmon Fillets recipe.