Golden Mashed Potatoes

Directions

1. 1
   In a soup kettle or Dutch oven, cook the potatoes and carrots in boiling salted water until tender; drain. Place in a bowl; mash and set aside.
2. 2
   In a skillet, saute onions in butter until tender. Add to potato mixture. Add sour cream, salt and pepper; mix until blended.
3. 3
   Transfer to a greased 13x9-in. baking dish. Sprinkle with cheese. Bake, uncovered, at 350° for 30-40 minutes or until heated through.
4. 4
   Cool unbaked casserole; cover and freeze. To use, partially thaw in refrigerator overnight. Remove from refrigerator 30 minutes before baking. Preheat oven to 350°. Bake casserole as directed, increasing time as necessary to heat through and for a thermometer inserted in center to read 165°.