01 - Combine softened cream cheese, mayonnaise, garlic powder, salt, and black pepper in a small mixing bowl. Mix until fully smooth and well blended.
02 - Arrange flour tortillas flat on a clean cutting board. Evenly distribute the cream cheese mixture across each tortilla, leaving a 1/2-inch border around the edges.
03 - Arrange spinach leaves over the filling, followed by a layer of cheese slices, deli turkey or ham (if using), shredded carrot, and red bell pepper strips.
04 - Working from one long side, tightly roll each tortilla into a firm log, keeping the fillings contained.
05 - Wrap each rolled tortilla log in plastic wrap and refrigerate for at least 30 minutes to help the rolls hold their shape.
06 - Remove plastic wrap and, using a sharp knife, slice each roll crosswise into 1-inch-wide pinwheels.
07 - Arrange pinwheels cut-side up on a serving platter and serve chilled or at room temperature.