I used part of this recipe from Taste of Home.
1 large acorn squash
1 T. butter
1 T. maple syrup
Cut ends from squash. Slice squash widthwise into four rings; remove seeds. Place rings on a greased, foil-lines baking pan. In a small saucepan, bring butter and maple syrup to a boil. (I did this in the microwave.) Brush each ring with syrup mixture.
Cover and bake at 350 degrees for 30 minutes. Uncover and bake another 10-15 minutes, basting with syrup mixture. (I didn't cover the squash, or rebaste at any time.)