For a smoother sauce, strain it through a fine-mesh sieve after simmering. If you don't have Cajun seasoning on hand, you can make your own blend using paprika, cayenne pepper, garlic powder, onion powder, dried oregano, dried thyme, and black pepper. This sauce can be made ahead of time and stored in the refrigerator for up to 3 days. Reheat gently over low heat, whisking occasionally, until warmed through. Consider adding a splash of heavy cream or a dollop of crème fraîche at the end for an extra rich and decadent sauce.