INGREDIENTS
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2 (6-ounce) beef tenderloin steaks (about 1-inch thick)
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1/4 teaspoon salt, divided
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1/4 teaspoon black pepper, divided
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2 teaspoons butter
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1/2 small onion, minced
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1 clove garlic, minced
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1/2 pound fresh mushrooms, thinly sliced
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1/4 cup dry red wine