Prick the casing of each sausage in a few places to prevent them from bursting. Place the sausages in a pot, cover with water, and bring to a boil over medium-high heat. Reduce heat to medium; simmer 8 minutes. Remove from pot and let cool.

Place toothpicks in a small bowl of water and soak 10 minutes to prevent burning on the grill.

Slice sausages halfway through on the long side. Stuff 3 prunes into the opening. Wrap a bacon slice around the sausage in a spiral and secure with two toothpicks. Repeat with all 6 sausages.

Preheat an outdoor grill for medium-high heat.

Place sausages onto preheated grill and cook, turning once, until desired doneness, or until bacon is browned. Serve on buns topped with desired condiments.