This is a very elegant dish that takes very little effort but looks beautiful. You can serve as an appetizer or side dish, or pair it with a soup and/or salad for a light meal. From Cooking Light Magazine (July 2008).
Coat 4 (6-ounce) custard cups or ramekins with cooking spray. Place 3 tablespoons flour in a medium bowl. Gradually add milk to bowl, stirring constantly with a whisk until blended. Add egg whites and eggs; stir well. Add Parmigiano-Reggiano, 1/8 teaspoon salt, and 1/8 teaspoon pepper; stir well. Divide mixture evenly among prepared custard cups. Place custard cups in a 9-inch square baking pan; add hot water to the pan to a depth of 1 inch. Bake at 375° for 25 minutes or until puffy and set.
Combine tomato, dash of salt, and dash of pepper in a medium bowl. Loosen edges of flans with a knife or rubber spatula. Place a plate, upside down, on top of each cup; invert onto plates. Spoon 1/2 cup tomato mixture over each flan. Top each serving with 1 tablespoon basil.