remove cabbage core, plunge cabbage in pot of boiling water, bring to full boil, and then remove from heat
allow cabbage to stay in covered pot about 20 minutes, drain, and allow cabbage to cool (reserve a bit of cooking water)
peel off 16 large leaves, trim coarse center ribs and set aside
sauté onions and garlic in Pam until clear but not brown
pour into deep bowl and add grated carrots, mashed butternut squash and seasonings and combine well
spoon mixture into center of each leaf, fold leaf edges over stuffing (envelope style), roll into cigar-shapes fastened with wooden toothpicks (plastic ones will melt)
arrange in two layers at bottom of deep, flame-proof dish
pour juice over stuffed leaves, cover, and simmer for half an hour
add more liquid if needed
Gilda's hints: great way to get those cabbage leaves off is to freeze the entire head of cabbage a day or two before - then let it thaw - the leaves wilt and come off easily. Also, I never found it necessary to use toothpicks - the little rolls hold their shape quite well - just put them in seam side down.