1Brush grill rack with vegetable oil. Heat coals or gas grill for direct heat.
2Trim fat on beef steaks to 1/2-inch thickness if necessary. Sprinkle garlic salt over beef. In small bowl, mix butter, basil and lemon-pepper seasoning; brush over beef and bell pepper halves.
3Cover and grill beef and bell peppers over medium heat 12 to 16 minutes, turning once, for medium beef doneness. Brush tops of steaks with butter mixture. Cut bell peppers into strips; serve over beef.