Heat oil in the sauté pan under medium heat, and add the chopped onion, bell pepper and okra, stirring for 6-8 minutes until soft. Add garlic for an additional I minute. Stir in the Cajun spice and/or cayenne pepper. If using white wine, add to the pan and turn the heat up to medium high so the wine simmers a few minutes. Then pour in the tomatoes, the salt and pepper to bring all to a boil. Turn the heat back down to medium and simmer lightly for another 10-12 minutes. Mix in the shrimp and continue simmering another 5 minutes until they turn pink in color. Serve the shrimp Creole over white rice and garnish with the chopped scallion or parsley.