INGREDIENTS
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4 (4-ounce) beef tenderloin steaks, trimmed (about 1/2 inch thick)
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1/4 teaspoon salt
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1/4 teaspoon freshly ground black pepper
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Butter-flavored cooking spray
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1 (8-ounce) package presliced baby portobello mushrooms
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1 cup dry red wine
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2 tablespoons butter
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1 teaspoon minced fresh rosemary