Languid days, firefly twilights: this salad just yearns to be made when the calendar hits July and refreshment needs to be close at hand. This quenching dish is an homage to the fruits of summer (and the herbs as well), with watermelon and tomatoes combining with mint to form its heart.

When my brother Jeff moved to California, he fell in love with avocados. In fact, he became so enamored with this luscious fruit that he began pestering me to create “avotatoes”—an avocado mashed potato recipe—for this book. I’d do almost anything for him, but there are some places a sister just can’t go. Still, I wanted to feature avocado because I love them too—for their flavor and texture, and for their incredible anti aging properties. While they do contain a fair amount of fat, it’s monounsaturated—the kind the body thrives on (in moderation, of course), and they’re a great source of the antioxidant glutathione.

A guest recipe by Andrew Weil, MD

We usually think of radishes as a minor ingredient in mixed salads that provides a watery crunch and sometimes a spicy snap. Here they take center stage along with arugula, basil, and radish sprouts in a lemon-olive oil vinaigrette with Parmesan cheese. If you can’t find radish sprouts, substitute sprigs of watercress trimmed of any coarse stems.

Cherries have a short summer growing season, so you’ll want to make the most of them when they show their cute, plump selves. Here the sweetness of the roasted cherries, the peppery freshness of arugula and the bite of goat cheese with a high note of balsamic vinegar is especially delicious. 

Beets are the power player here; they contain natural nitrates, which the body turns into nitric oxide, which in turn expands the walls of blood vessels and increases blood and oxygen flow to benefit the brain and other parts of the body.

One of the great things about traveling is that it gets you out of food ruts. When you’re in a different part of the country, or of the world, it’s hard to ignore local fare. When an eighty-year-old nonna puts a strange salad in front of you, what are you going to say—“No?” I remember the first time I saw this salad in Italy. My initial reaction was, “Oranges with cracked pepper? Really?!”

Visual appeal is a vital though often ignored aspect of good digestion, as a mouthwatering response to the food on your plate prompts greater production of saliva, which helps break down food from the moment it hits your tongue. When I’m teaching, I like to use quinoa to underscore the importance of appearances. After an unenthusiastic glance at a bowl of cooked plain quinoa, the response is usually “Doesn’t look like much. Kinda tan.” Then we go to work on it, studding the quinoa with tiny green lentils and a blast of color from cucumbers, tomatoes, parsley, and mint that gets people excited about this dish. It looks like an edible painting by the time we’re done. Now that’s my idea of art.