I once heard that it is possible to make coffee from seeds of dates.
I heard that you have to bake them in a low temperature.
So, I took seeds of dates, baked them in the oven in 100 degrees celsius for about an hour, and then tried to grind them.
The blades of the grinding machine broke.
Before I try again, I would like your seasoned advice: how can I make coffee from seeds of dates?
How can I know in advance that the seeds are soft enough for grinding?