Bacon and spring onion potato salad

Salad

• 2 spring onions/shallots trimmed and cut into thirds, plus extra cut into thin slices for garnishing
• 150 g bacon cut into pieces (1-2 cm)
• 20 g olive oil
• 500 g water plus extra for cooling
• 1000 g potatoes peeled and cut into pieces (2 cm)
• 6 eggs

Dressing

• 200 g mayonnaise (see Tips)
• 20 g wholegrain mustard
• 2 tsp balsamic vinegar

Assembly

• 60 g Parmesan cheese shaved, plus extra for garnishing
• 1 pinch ground black pepper