Chicken Gumbo

Ingredients:
1⁄4 cup vegetable oil, 2 1⁄2 lb. chicken, cut into pieces, 1 tsp. salt, 1⁄2 tsp. cayenne, 3 lb. fresh okra, trimmed and sliced, 1 cup tomatoes, finely chopped, 2 cups onion, finely chopped, 8 cups hot Chicken Stock or water