Combine wafer crumbs, 1/4 cup sugar, butter and lemon zest; press onto bottom of 8-inch square pan.
Bake 8 min.
Whisk eggs and remaining sugar in small bowl until blended and thickened.
Add lemon juice, flour and baking powder; mix well.
Pour over crust; sprinkle with coconut.
Bake 25 to 30 min. or until center is set and top is lightly browned. Cool completely. Refrigerate several hours or until chilled before cutting to serve.