Tangy Tomato Mustard Tart

This tart is great for a light lunch accompanied with a green salad. You can dress it up by adding basil or mozzarella, but I like to keep it simple, using just a touch of Parmesan and letting the flavor of vine-ripe tomatoes stand out. The tang of Dijon mustard creates a nice balance with the sweetness of the tomatoes and the light seasoning of Herbes de Provence.