In a medium bowl, combine the chopped dates and tamarind pulp.
Pour the boiling water over them and let the mixture soak for 30 minutes to soften.
After soaking, carefully check the tamarind for any seeds and discard them.
Transfer the entire mixture, including the soaking water, to a food processor or high-speed blender.
Add the apple cider vinegar, minced ginger, orange juice concentrate, garam masala, and salt to the blender.
Blend on high until the sauce is completely smooth. You may need to stop and scrape down the sides of the bowl a few times to ensure everything is well combined.
Taste and adjust the seasoning before serving.
Add a little jaggery or maple syrup for more sweetness, or a squeeze of lime juice for extra tang.