For a ready made roux uses Savoie’s Dark Roux it comes in a jar and is made with just oil and flower i uses it when i don't have time to make a roux from scratch. As far as putting okra in it is all up to the taste of the cook i personaly don't like okra so i never put it in My famly on the other hand love shrimp and okra gumbo.

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Just my two cents