1 box vanilla wafers, crushed
2 c. Cool Whip
1 c. nuts (optional)
1 1/2 pt. fresh blueberries
2 1/2 c. confectioners' sugar
3/4 stick butter
1 egg
1 (20 oz.) can chunk pineapple, drained

Spread 3/4 of water crumbs in bottom of 9 x 12 inch pan. Mix Cool Whip and nuts. Spread 3/4 of this mixture over crumbs (reserving the rest). Spread blueberries over this mixture. Beat together sugar, butter, and egg. Spread over blueberries. Spread pineapple over this mixture. Spread the Cool Whip and nuts previously reserved over this mixture and sprinkle remaining wafer crumbs over top. Cover and refrigerate overnight.