Cook squash. Mash. Add all ingredients except stuffing. Whip together until smooth - using fork for coarser bits. Fold into greased casserole lined with thin layer of stuffing. Dot top with butter. Spread remaining stuffing over top. Bake in 350° oven for 20 minutes or until topping starts to brown.
Hint: Making this for a big holiday dinner? Make extra dressing for your meal (you're doing it anyway) and use it instead of a box mix.
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