Start with the remoulade sauce: Mix all sauce ingredients in a bowl until well combined. Cover and refrigerate for at least 30 minutes to let flavors meld.
For the crab cakes: Gently pat the crab meat dry with paper towels to remove excess moisture.
In a large bowl, combine mayonnaise, egg, Dijon mustard, Worcestershire sauce, Old Bay seasoning, salt, and pepper.
Add the red bell pepper and parsley to the mixture and stir until well combined.
Very gently fold in the crab meat and panko breadcrumbs, being careful not to break up the lumps of crab too much.
Cover the mixture and refrigerate for at least 30 minutes (this helps the cakes hold together better).
Form the mixture into 8 equal-sized patties, about 3 inches in diameter.
Heat oil in a large skillet over medium heat until shimmering.
Cook crab cakes for 3-4 minutes on each side until golden brown and heated through.