Chilled Zucchini Soup with Purslane

Alain Coumont’s cool vegan soup gets its creaminess from pureed zucchini, sautéed onion and garlic. It’s brightened with purslane, a lemony weed that Coumont plucks from his Languedoc country garden; if purslane is not available at your local farmers’ market, substitute baby arugula leaves instead.
In a large saucepan, heat the 2 tablespoons of olive oil. Add the onion and garlic and cook over moderate heat until translucent, about 8 minutes. Stir in the thyme and bay leaf and cook until fragrant, about 1 minute. Add the sliced zucchini, season with salt and cook, stirring occasionally, until tender, about 10 minutes. Add the water and bring to a boil. Remove the saucepan from the heat. Discard the bay leaf and stir in the shredded basil….
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