From a magazine clipping of unknown origin in my Mums scrapbook. Possibly around 1970's vintage, from an Australia magazine of the time, such as New Idea, Womens Weekly or Womans Day, which were all full of tips for busy housewives.
"A lovely starter to please the fussiest of guests, can be made by simply halving and removing the pip from an avocado, and filling the hollow with a good vinaigrette."
My Favourite Retro Vinaigrette
1/4 cup white vinegar
1/2 cup oil
1 teaspoon each of salt and sugar
1/4 teaspoon white or black pepper
Pinch of Cayenne or Paprika
Combine in a jar with a screw top lid. Shake vigorously to combine well, and serve immediately. Excess can be stored in the refrigerator, but should be brought to room temperature if the oil has solidified, and shaken again before use.