"This squash dish is adapted from a Whole Foods recipe...."
INGREDIENTS
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1 large butternut squash, peeled, seeded and cut into  3/4-inch dice
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3 tablespoons extra-virgin olive oil (divided)
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1 teaspoon salt
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1 small red onion, thinly sliced
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Salt and pepper to taste
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1 package (5 ounces) baby spinach
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 1/4 cup blue cheese crumbles
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3 tablespoons lemon juice