Cook Sausages: In the same skillet, cook sausages until browned and heated through, about 8–10 minutes. Turn occasionally.
Prepare Spicy Mayo: Mix mayonnaise, Creole mustard, and hot sauce in a bowl.
Assemble Sandwiches: Toast rolls, spread spicy mayo on each side. Place a sausage in each roll, top with peppers and onions, and sprinkle with parsley. Serve warm.
Notes
For extra flavor, slice the sausage before cooking to maximize browning.
You can substitute chicken or plant-based sausage to suit dietary needs.