Warm Salad with Jerusalem Artichokes, Bacon, and Radicchio

Ingredients

• 6-8 Jerusalem artichokes, scrubbed
• 5 slices thick-cut bacon, cut into 1/2-inch slices
• 1 small red onion, thinly sliced
• 1 small head radicchio, halved and thinly sliced
• 1 large head butter lettuce
• 1 small handful flat leaf parsley, roughly chopped
• 4 tablespoons balsamic vinegar
• Extra virgin olive oil to taste (optional)
• Shaved Parmesan