Place potatoes in large pot and cover with cold water.
Over high heat bring to a boil.
Reduce temperature to maintain a rolling boil.
Cook for roughly 20 minutes or until a knife easily pierces the potatoes.
Drain and cool.
Dice potatoes in large pieces and place in bowl.
Combine the green onions, red bell pepper, eggs and capers with the potatoes.
In a separate bowl mix mayonnaise, mustard, capers juice, and dill weed. Add salt and pepper to your taste.
Add the mayonnaise mixture to the potato mixture and stir well.
Chill in the fridge until cool, or overnight before serving.