Crush all of the seeds, sticks, berries and pods with a mortar and pestle and then mix all together with the red rooibos. You can choose to leave the cardamom, cloves, allspice berries and coriander whole if you prefer. I find crushing each herb individually and then mixing it all together at the end makes it more even. If you want to do it quicker, you can chop the herbs in a coffee grinder or high-powered blender, like a Vitamix. For the chaga, you can get powdered chaga, or you can get chaga mushroom pieces and grind them into powder using a coffee grinder.
Notes
Stores well for 6-9 months in an airtight jar or canister.
Recipe by The Yum Queen at https://yumqueen.com/spicy-chaga-chai-tea/