My mother loves this as well as I do. We ate this in a resturant and I kept searching ingredients until I came up with a similar recipe. It's good comfort food & I will be making this for our "Thanksgiving Dinner".
Cook squash until tender, saute onion in sm. amt. of butter, then mix all ingredients together. Top with the four cheese (mexican blend). Bake @ 350 degree oven for 30 min. or until bubbly & brown.
** Just made a good recipe better....saute onion in (1/2) stick of butter & try using (1/2) box of chicken stove top stuffing. I also used the 2lb bag of Pic Sweet frozen squash or you can use fresh. I like more squash in my recipe.