Tip into a bowl. Mix in the tomatoes, pecorino and oil. Season with the salt and pepper. Bring a pan of salted water to the boil and cook the pasta until al dente. Drain it and stir the pesto through.
Using a large spoon, gently stir in olive oil, red pepper ... of reserved pasta water into the pot until the noodles are glistening. Spoon into bowls and serve with freshly grated pecorino piled ...