Break lettuce in a large bowl. After each layer add onion, peas, mushrooms and water chestnuts. create 4 layers. Spread mayonnaise like cake frosting after 4th layer of lettuce. Add sugar and enough parmesan cheesae to completely cover the top.
Cober and refridgerate overnight. Before serving mix well and add crumbled bacon, tomatoes and hardd boiled eggs.
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