One of my typical gruit blends meets White Labs Trappist Ale (aka Monastery) yeast. I made a gallon of tea ahead of time from the staghorn sumac, mugwort, yarrow, and 2 oz. of the sweetfern, then heated it up and added it to the boil just before the end, after a long boil to reduce the volume of the wort to ~4 gallons. This was probably more work than is absolutely necessary, though I think the caramelization was an asset.
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