"Pasta cooks directly in its sauce in this genius vegetarian dish that stars lentils and deeply browned mushrooms...."
INGREDIENTS
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¼ cup olive oil
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1 medium onion, finely chopped
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8 oz. crimini mushrooms, stems trimmed, chopped into ¾" pieces
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1 tsp. kosher salt, plus more
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2 garlic cloves, coarsely chopped
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1 cup brown lentils, rinsed
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¼ cup double-concentrated tomato paste
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½ tsp. crushed red pepper flakes
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10 oz. orecchiette or conchiglie
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1½ oz. Parmesan, finely grated (about ½ cup), plus more for serving
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3 Tbsp. unsalted butter, cut into pieces
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½ cup coarsely chopped parsley, plus more for serving