Select firm, red, ripe Roma tomatoes. Cut in half lengthwise and place on a baking pan cut side up. Drizzle margarine or a butter on each half. Sprinkle lightly with salt. Sprinkle finely chopped fresh herbs or dried on each half. Then, simply sprinkle a generous amount of Parmesan cheese on the prepared tomatoes. Place underneath a preheated broiler for 3 to 4 minutes and remove when the Parmesan cheese has melted. Also, this recipe will work in the microwave on medium-high for 1 to 2 minutes (watch closely, or tomatoes will overcook). Serve as either an appetizer or hors doeuvre, or as a tasty side garnish on a main plate entree. Very delicious and a nice touch. Enjoy!