Creating cold pinwheel sandwiches is as easy as following these straightforward steps:

1. Prepare the Work Surface: Clean your countertop or cutting board, and gather all the necessary ingredients.
2. Spread Cream Cheese: Using a spatula, evenly spread a layer of softened cream cheese over one side of each tortilla.
3. Season the Cream Cheese: Sprinkle garlic powder, onion powder, salt, and pepper onto the cream cheese layer for added flavor.
4. Layer Fillings: On top of the cream cheese, layer the turkey or ham, followed by a handful of baby spinach leaves, shredded carrots, and sliced bell peppers. Add crumbled cheese, if using.
5. Roll the Tortilla: From one edge, carefully roll the tortilla tightly until you reach the other end. Make sure to compress the fillings within as you roll.
6. Wrap and Chill: Wrap the rolled tortilla tightly in plastic wrap. Refrigerate for at least 30 minutes to firm up the roll and meld the flavors.
7. Slice the Rolls: Once chilled, remove the plastic wrap, and using a sharp knife, slice the roll into equal pieces, about 1-inch thick.
8. Arrange on a Platter: Place the sliced pinwheels on a serving platter, arranging them beautifully for presentation.

Follow these steps, and you’ll have a platter of colorful, tasty cold pinwheel sandwiches ready to serve!