"A tender and flavorful Salisbury Steak recipe covered in a delicious gravy full of mushrooms and onions. Makes a filling family dinner...."
INGREDIENTS
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1/2 cup milk
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1/3 cup instant potato flakes
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1 packet dry onion soup mix
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1 pound lean ground beef ((90%))
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1/4 teaspoon pepper
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4 tablespoons butter, (divided)
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1 tablespoon vegetable oil
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1 medium yellow onion, (peeled, cut in half and thinly sliced)
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1 (8-ounce) package white mushrooms, (sliced)
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2 tablespoons flour
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1 tablespoon ketchup
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1 can beef broth