Red Potato Salad

Ingredients

• 1 1/2 pounds red potatoes, organic if possible
• 1/4 cup Dijon or Dusseldorf mustard
• 1/4 cup dry white vermouth
• 1/4 cup white wine vinegar
• 2 tablespoons extra-virgin olive oil
• 1 yellow onion
• 2 stalks celery
• 2 tsp capers
• 1/2 cup chopped fresh parsley
• Chopped fresh dill to taste
• 1/2 lb steamed green beans, cut in 1-inch pieces (optional)