"One of our favorite ways to make asparagus. We love all of the ingredients and this is great for company because you can make it up ahead of time and..."
INGREDIENTS
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3 lbs asparagus, trimmed
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1 lb mushroom, thickly sliced
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1 large red onion, sliced
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1/4 cup vegetable oil
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1 1/2 teaspoons salt
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1/2 teaspoon pepper