Possible Clues:

• Any ABBA singer
• Man from Malmö
• Meals we desire will include this root vegetable
• Bjorn Borg, by birth
• European to take the plunge in Serpentine's perimeter
• European veggie
• Ingrid Bergman or Bjorn Borg
• Large root vegetable
• Inhabitant of Sweden
• European announcement of opposing players' marriage?