Potato salad is an easy recipe to divide. (You can’t do this with all recipes, especially when baking.)
Find a ‘Classic Potato Salad’ recipe. If the recipe says that it makes six servings, just cut all the ingredients in half, for 3 servings. Always taste as you go along - you’ll be able to make a small amount, just enough for Dr. B. P.
-JT
Thanks! I do some looking!