1) Preheat your oven to 200?.
2) Place a pan of cold water on a high heat to boil, then add the pasta and cook for 10 minutes.
3) Once the pasta has cooked, drain the pasta water and pour it into an ovenproof dish.
4) Spoon the pesto on top and give it a good mix.
5) Chop the cherry tomatoes in half and scatter them, the cheese, and the tomatoes over the top.
6) Put the pasta in the oven for 20 minutes or until the cheese has melted.