Spring onions look like scallions but have a larger, rounder bulb. If they are unavailable, use yellow onions.
Ingredients
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2 tablespoons extra-virgin olive oil, plus more for drizzling
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2 pounds spring onions (or yellow onions), trimmed and thinly sliced
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2 ½ teaspoons coarse salt
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1 ¼ cups homemade or low-sodium store-bought chicken stock
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2 cups water
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8 pieces crisp flatbread, for serving
Directions
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Heat oil in a large pot over medium-high heat. Add onions, and cook, stirring occasionally, until translucent but not brown, about 15 minutes.
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Stir in salt, stock, and water. Bring to a simmer, and cook for 15 minutes.
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Remove from heat, and let cool for 20 minutes. Working in batches, puree in a blender, starting on low speed and gradually increasing to high, blending until soup is smooth.
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Divide soup among 4 bowls, drizzle with oil, and serve with flatbread on the side.