I don't know if this is the recipe made famous by the Whistle Stop Cafe, but the result is surely good to eat. Wash tomatoes; remove stem end. Cut crosswise into 1/2" slices. Blend flour, salt and pepper. Dip slices into mixture. Brown quickly in vegetable oil, on one side. Turn and reduce heat. Cook until soft in center.
Heat oil in a wok or skillet; add onion and zucchini. Stir fry over medium heat for 5 minutes. Stir in remaining ingredients. Cook, covered, for 5 minutes longer, or until vegetables are tender, but slightly crisp.