Pre-heat an oven to 180oC / 350oF / Gas Mark 4. Put the chicken in a lidded oven dish with the stock and cook in the oven for 20 minutes. Set the chicken aside and reserve the stock.

Cook the pasta as directed. Whilst the pasta is cooking microwave the onion for 2 minutes. Add the broccoli and microwave in one-minute blasts until the broccoli is to your liking.

Put the stock in a saucepan over medium to high heat. Stir through the crème fraîche together with the mustard, garlic and pepper. Drain the pasta and stir it through the sauce. Add the microwaved vegetables and tomatoes and heat through. Transfer to a warmed shallow ovenproof dish. Sprinkle with the bread crumbs and hard Italian cheese and put under a medium to hot broiler / grill until the bread has toasted.