Place the ham slices in a shallow baking dish. Drain 1 can of tomatoes, combine with other can of undrained tomatoes. Break up tomatoes into halves or smaller pieces. Add sugar, pepper and Angostura aromatic bitters to tomatoes; pour mixture over ham. Cover dish with lid or aluminum foil and bake in preheated 350ºF. oven for 20 minutes. Cut cheese slices in strips; arrange over ham slices. Return the dish to oven for 10 -15 minutes, or until the cheese is melted and browned. Serves 8