Slice squash, then cook in hot water 'til tender. Drain well and mash. Saute onion & crackers in marg, add milk. Add to squash. Pour into greased casserole & top w/a few * cracker crumbs & dot with marg.
Bake at 400°F for about 30 minutes or until knife inserted in center comes out clean. 8-10 servings.