Grandma's Potato Salad

Ingredients

• 750 g (1-1/2 lbs) new or small red potatoes, halved or quartered
• 2 eggs
• 2 stalks celery, diced
• 1 small cucumber, peeled, seeded, and diced
• 4 scallions, sliced
• 125 mL (1/2 cup) plain nonfat yogurt
• 50 mL (1/4 cup) low-fat sour cream
• 50 mL (1/4 cup) low-fat mayonnaise
• 30 mL (2 tbsp) red wine vinegar
• 15 mL (1 tbsp) Dijon mustard
• 1/2 mL (1/8 tsp) each salt and pepper
• 30 mL (2 tbsp) chopped parsley