- In a pot filled with salted water, boil the Jerusalem artichokes until tender. - 2 handfuls Jerusalem artichokes 
- Cut them in half and set them aside to cool. 
- In a large bowl, mix the lettuce with the finely sliced radicchio and parsley. - 1 radicchio, 3 small butter or Boston lettuces, 1 handful fresh parsley 
- Add some cooking fat in a skillet and place over a medium heat to fry the bacon pieces, until lightly brown. - Cooking fat, 8 slices good quality bacon 
- Add the onions and cooked Jerusalem artichoke halves to the skillet with the bacon and fry everything until the bacon and Jerusalem artichokes are nice and crispy. - 1 small onion 
- While the hot ingredients are cooking, mix the balsamic vinegar with the olive oil in a small bowl, season with salt and pepper and pour in the bowl with the lettuce and radicchio, combining everything with your hands. - 3 tablespoon balsamic vinegar, Extra-virgin olive oil 
- Serve the hot bacon, Jerusalem artichokes and onion on plates topped with a portion of the lettuce and radicchio. - Sea salt and freshly ground black pepper to taste 
- Eat immediately while still hot.