Turkey crown with roast garlic & pancetta

Name: Turkey crown with roast garlic & pancetta
Prep time: 35 min
Cook time: 2 h
Total time: 2 h 35 min
Cuisine: Italian
Ingredients: 2-2.5kg/4lb 8oz-5lb 8oz turkey crown; olive oil; about 10 thin slices streaky bacon or pancetta; small rosemary sprigs; 1 large onion, cut into 8 wedges; 4 tbsp olive oil, plus extra to drizzle; 2 medium onions, chopped; 3 garlic cloves, finely chopped; 50g pine nuts; 85g grated parmesan; 6-8 slices pancetta, chopped; 1 small loaf ciabatta, to give 280g/10oz breadcrumbs; 4 tbsp flat-leaf parsley, chopped; 1 tbsp rosemary, finely chopped; zest 1 lemon, finely grated; 2 eggs, beaten; 3 whole bulbs garlic, halved horizontally; 1 lemon, cut into 6 wedges; 4 tsp plain flour; 175ml medium-sweet marsala; 850ml turkey or chicken stock