Heat a large pot over medium heat and melt the duck fat (or chosen fat).
Add the chopped onion and bell pepper, stirring occasionally, and cook for about 3 minutes until they soften.
Stir in the minced garlic and cook for another 2 minutes, allowing it to release its aroma.
Add the sliced okra, chopped tomatoes, and chicken stock to the pot.
Season the mixture with cayenne pepper, salt, black pepper, thyme, and add the bay leaf.
Stir well and let it simmer for about 20 minutes, stirring occasionally, until the okra is tender and the flavors meld.
Remove the bay leaf before serving.
Enjoy as a side dish or serve over cooked rice for a more filling meal.