1 med. onion, chopped
1 stick butter
2 bags frozen California blend vegetables
1 jar Cheese Whiz
1 can mushrooms, drained
1 pkg. slivered almonds
1 can cream of mushroom soup

Saute onion in butter. Mix with vegetables in casserole. Mix together soup, Cheese Whiz, mushrooms and almonds. Pour sauce over vegetables. Bake at 350 degrees for 45 to 60 minutes.