*Choose avocados that are firm, with just a slight give. If the avocado is
soft enough to hold an indentation, it's overripe and won't have the rich
nutty flavor that you want for this salad.
Bring water to a boil in the bottom of a vegetable steamer. Cut potatoes
in half; place them in the steamer basket. Cover and steam until they are
cooked through, about 2 minutes. Remove the potatoes from the heat and
allow them to cool slightly.
While potatoes are cooking, whisk oil and vinegar together in a large bowl.
Season to taste with salt; set aside. When potatoes are cool enough to
handle without burning your fingers, cut them in 1 inch cubes. Toss them in the
oil and vinegar so they are coated well, and set them aside to cool to room
temperature, tossing occasionally.
In a small bowl, whisk together the sour cream, yogurt and horseradish.
Mince the dill and add it to the sour cream mixture, stirring well.
When potatoes have cooled to room temperature, add celery and toss to
combine. Then add the sour cream mixture; toss again.
Halve, pit and peel the avocados. Cut them into 1" cubes; place in a small
bowl with the lime juice. Toss so the cubes are moistened with the juice.
Then add the avocados, with all of the lime juice, to the potatoes; toss
gently until they are well distributed and coated with the dressing. Add
pepper and additional salt to taste, and either serve immediately or chill
for 3 minutes and then serve.
While Loomis says that this salad does not keep well and shouldn't be
counted on for leftovers, she says that it's one of the most popular potato
salads she's ever made.
Yield: 6 to 8 servings.
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