01 - Combine cream cheese, sour cream, cheddar cheese, green onions, red bell pepper, spinach, garlic powder, black pepper, and salt in a medium bowl. Mix thoroughly until completely smooth and evenly blended.
02 - Place tortillas flat on a clean work surface. Distribute the cream cheese mixture evenly across each tortilla, spreading to the edges while maintaining a 1/2-inch border around the perimeter.
03 - Roll each tortilla tightly from one edge to create a compact log shape. Apply firm, even pressure to eliminate air pockets and ensure tight rolling.
04 - Wrap each rolled tortilla securely in plastic wrap. Refrigerate for a minimum of 1 hour to firm the filling for clean slicing.
05 - Remove plastic wrap and use a sharp knife to cut each roll into 6 evenly sized pinwheels approximately 1-inch thick. Wipe the knife clean between cuts for neat slices.
06 - Arrange pinwheels on a serving platter and sprinkle with fresh parsley if desired. Serve immediately while chilled or keep refrigerated until ready to serve.