Wash the rhubarb, peel if necessary, and cut into 1 cm pieces.
Chop the dates into small pieces.
Grind the cloves, allspice, and coriander seeds using a mortar and pestle – or use pre-ground spices if you prefer.
Peel and finely chop the onion.
Finely chop the chili.
Heat the ghee in a saucepan over medium heat.
Add the mustard seeds and toast until they start to pop.
Add the ground spice mix and toast briefly until fragrant.
Stir in the rhubarb and dates.
Add the water and simmer for about 20 minutes.
Once the rhubarb begins to break down, add turmeric and salt.
Pour the chutney into two sterilized 500 ml jars (or four 250 ml jars).
Let cool slightly, then seal the jars.