Cook the pasta following pack instructions until al dente, about 12 mins.

Meanwhile, heat the oil in a deep frying pan over a medium heat and cook the garlic and leeks for 5 mins, stirring until soft. Add the spinach, cover and cook for 3 mins more until wilted. Stir well.

Mix the ricotta with the milk, cheese and a grating of nutmeg. Drain the pasta (reserving a mugful of the water), and add it to the veg. Pour over the ricotta mixture and toss well to combine. Add 3-4 tbsp of the reserved pasta water to loosen a little, then serve.