BALSAMIC RED CHICORY AND PANCETTA PENNE

400g penne • 1 tbsp olive oil • 8 slices pancetta, finely sliced • 4 sprigs rosemary, leaves picked • 2 garlic cloves, finely sliced • 2 red chicory bulbs, trimmed and sliced pinch dried chilli flakes • 2 tbsp balsamic vinegar • ½ tbsp clear honey • 50g parmigiano reggiano, finely grated