This is a retro gelatin salad that is a little more appealing than some- no meat products involved. It is from a Best Foods Mayonnaise ad in the August 1965 issue of Family Circle Magazine. The copy says "Believe it or not, just an ordinary layer cake pan is all it takes to make this interesting salad shape." I have seen butterfly cut-up cakes made this way but never a salad.
"Butterfly" Gelatin Salad
2 cups boiling water
2 (3 ounce) packages lime gelatin
1 cup cold water
1 tablespoon vinegar
1/2 teaspoon salt
3/4 cup Best Foods Real Mayonnaise
1/2 cup each shredded carrot, finely chopped radish, celery, and green pepper
2 tablespoons finely chopped onion
Pour boiling water over gelatin; stir until completely dissolved. Add cold water, vinegar, salt and pepper. Pour 1 cup of the mixture into 9-inch layer cake pan. Set aside. Add Real Mayonnaise to remaining gelatin; blend with rotary beater. Pour into freezer tray. Chill in freezer until firm at edge, still soft in center, 30 minutes. Meanwhile, chill clear gelatin 10 minutes or until thickened. Turn mayonnaise mixture into bowl; whip with rotary beater until fluffy. Fold in vegetables. Spoon on top of clear gelatin. Place in refrigerator until set, 1 hour; Unmold onto moist cookie sheet. Cut in half. Using wide spatulas, lift to large plate; place rounded edges to center to form butterfly. Garnish as desired. 8 servings.