Warm salad of crispy smoked bacon & Jerusalem artichokes

INGREDIENTS

• 2 handfuls large Jerusalem artichokes or new potatoes
• sea salt
• freshly ground black pepper
• 1 radicchio or treviso, outer leaves discarded
• 3 little gem lettuces, leaves washed, dried and stalks removed
• 1 small handful fresh flat-leaf parsley or chervil, leaves picked and finely sliced
• extra virgin olive oil
• 8 rashers thickly sliced higher-welfare smoked streaky bacon or pancetta
• 1 small red onion, peeled and finely sliced
• 3 tablespoons balsamic vinegar