Relishes typically contain cooked and pickled vegetables; the one here is mouth-tinglingly tangy. James Syhabout of Oakland, California's Commis makes it by pickling shallots, capers, pistachios and pink peppercorns overnight in Champagne vinegar and olive oil. It's awesome on tomatoes, but he also likes using it on fish. Best New Chef 2010: James Syhabout More Easy Recipes from the 2010 Class of Best New Chefs
In a jar, combine the pistachios with the shallots, capers, vinegar, sugar, pink peppercorns and the 2 tablespoons of olive oil; season with sea salt. Refrigerate the relish overnight.
Arrange the tomato slices on plates. Drizzle lightly with olive oil and sprinkle with sea salt. Stir the relish and spoon it over the tomatoes. Garnish with basil leaves and serve.
The relish can be refrigerated for up to 3 days.
American wine regions tend to produce softer, more fruity dry rosés than European regions, making U.S. rosés a good complement to tangy dishes like this one. Try a strawberry-inflected rosé or a wine made with the Gamay grape in California.
I have made this a few times and it is always great. An unusual mix of flavors that just work and surprise my guests.