"To save time, buy a peppercorn medley packaged in a pepper grinder (available in the spice section of the supermarket)...."
INGREDIENTS
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1/4 cup (1/2 stick) butter, room temperature
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2 teaspoons chopped fresh parsley
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1 garlic clove, minced
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1/2 teaspoon ground mixed peppercorns, plus more for sprinkling
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1/2 teaspoon (packed) grated lemon peel
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1 tablespoon olive oil
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4 1-inch-thick swordfish fillets (about 6 ounces each)