More instructions from Northern Brewer:
If you want to incorporate actual vegetables in this recipe, you’ll need to purchase an additional 2 or 3 pounds of Rahr 6-row (#G002) and provide your own 8 to 10 pound pumpkin (winter squash like butternut or acorn will work if pumpkin is out of season). Cut up the gourd, discard the innards, and roast or microwave the pieces until soft and cooked through, then peel. Mash the peeled, cooked pumpkin flesh with upto 3 gallons of hot water, the 6-row and the included grains at 152°F for 1 hour. Then strain the liquid off and add it to the water in the boil kettle, topping up to achieve 3 gallons
Should I mash with 2.5 gallons and rinse with a .5 gallon for a total of 3 gallons? Then I will have 3 gallons of wort... I plan on using 60 oz. of pumpkin puree...