Combine all ingredients in a large pot and bring to a boil. Reduce heat and simmer for 20 minutes. Turn off heat and allow sauce to cool slightly. Blend in small batches in a blender and then strain through a fine-mesh strainer.
* For best results, prepare for immediate use in fountain. Refrigerating and reheating the sauce may slightly alter its consistency.
Yield: Makes enough for the largest home fountains.