Preheat oven to 350 degrees. Mix wafer crumbs, 1/4 c sugar, butter and zest until well blended. Press firmly into an 8" square pan. Bake 8 min.
Beat eggs and remaining 3/4 c sugar with whisk until thickened. Add juice, flour, baking poder and salt. Mix well and pour over crust. Sprinkle with coconut. Bake 25-30 min or until center is set and top is lightly browned. Cool. Cover and refrigerate.