Love Swordfish steaks, especially when I can get them fresh. They are nice and firm, and don't have a "fishy" taste! Also love avocado....this is a great marriage of two great tastes! Prep time doesn't include marinating time!
Place steaks in two 13 x 9 x 2 inch backing dishes. Combine vegetable oil and next 4 ingredients in a small bowl; stir well. Pour marinade mixture over steaks; cover and marinate in the refrigerator for 2 hours, turning occasionally.
Remove steaks from the marinade, reserving the marinade. Place marinade in a small saucepan. Bring to a boil; reduce heat, and simmer 5 minutes. Set aside.
Grill steaks over hot coals for 9 minutes on each side or until fish flakes easily when tested with a fork, basting frequently with the reserved marinade. Serve with Avocado Butter. Garnish with parsley sprigs.
Combine butter and avocado in a small mixing bowl; beat at medium speed of an electric mixer until smooth. Add the lime juice, parsley, garlic, and salt; stir well. Cover and chill until firm. If desired, shape butter into small bowls before serving.