1000 degree rocks
That's how.
After conditioning my barrel, it was leak proof and ready to mash and boil.
Used 8 Dzn granite rocks 3 times. To bring wort to strike temp. Mash, stabilize, step, then boil.
I DID NOT strain the wort from mash. Left it in. Added hops. Left it in.
Mash ph was 5.3...