Vegetables in a Cloud

2 T. butter
1/2 c. onions, chopped
3 c. broccoli, in bite size pieces
3 c. cauliflower, in bite size pieces
4 carrots, peeled and cut into thin strips
15 ounce can sliced water chestnuts
1/2 c. water
seasoned salt
1 c. extra heavy whipping cream
1 c. mayonnaise
1 c. cheddar cheese, grated
1/2 c. Parmesan cheese

Saute onions and water chestnuts in butter in frying pan until tender. Add all vegetables and water and cover tightly. Let vegetables steam until crisp tender. Drain well. Put vegetable mixture in greased casserole dish. Sprinkle with seasoned salt and mix well. In mixing bowl, whip cream until peaks form. Fold in mayonnaise and cheese. Spread cream mixture over vegetables and bake at 350 degrees for 45 minutes or until golden brown. Serves 8-10