"I like having an ace recipe up my sleeve, and this tenderloin with Dijon is my go-to for birthdays, buffets and holidays. —Donna Lindecamp, Morganton, NC..."
INGREDIENTS
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4 beef tenderloin steaks (1 inch thick and 4 ounces each)
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1/2 teaspoon salt
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1/4 teaspoon pepper
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5 tablespoons butter, divided
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1 large onion, halved and thinly sliced
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1 cup beef stock
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1 tablespoon Dijon mustard