01 - In a medium mixing bowl, combine the softened cream cheese, mayonnaise, Cajun seasoning, and Dijon mustard until mixture is smooth and uniform.
02 - Arrange the flour tortillas on a clean cutting board. Evenly spread one-fourth of the cream cheese mixture over each tortilla, leaving a 1/2-inch border around the edges.
03 - Distribute spinach leaves, roast beef slices, diced red bell pepper, and sliced green onions evenly across each tortilla.
04 - Starting from one end, tightly roll up each tortilla to secure the fillings, placing seam side down once rolled.
05 - Wrap each roll tightly in plastic wrap and refrigerate for a minimum of 30 minutes to firm for cleaner slicing. (Optional but recommended.)
06 - Remove plastic wrap. Using a sharp chef's knife, slice each roll into six even pinwheels. Arrange pinwheels on a serving platter.
07 - Sprinkle chopped fresh parsley over pinwheels prior to serving, if desired.