In a bowl, mix cream cheese, garlic powder, salt, and pepper until smooth.
Spread a thin layer of the mixture over each tortilla.
Evenly sprinkle bell pepper, carrots, green onions, spinach, and meat (if using) over the tortillas.
Tightly roll up each tortilla and wrap in plastic wrap.
Chill for 30 minutes, then slice into 1-inch pinwheels and serve.