Old-fashioned Potato Salad

• 3 eggs (hard cooked)
• 1 clove garlic
• 850 gr cubed unpeeled round (red)
• 180 ml fat-free sour cream
• 80 ml fat-free mayonnaise
• 60 gr onion (diced)
• 50 gr celery (diced)
• 20 gr sweet
• 5 ml dry mustard
• 3 gr parsley (chopped fresh)