Penne with kale, roast onions and Gorgonzola

Method

1. Place the kale into a large saucepan and cover with water. Bring to the boil and cook for 5 mins, then drain really well and set aside.
2. Halve the onions lengthways then cut each half into crescent-moon-shaped slices, about 1cm (½ in) thick at the thickest part. Toss these in a roasting tin with 4tbsp of the olive oil and the balsamic vinegar, and season to taste.
3. Roast in a preheated at 200°C (400°F, gas mark 6) for 30-35 mins, stirring occasionally. The onions should be tender and slightly charred.
4. While the onions are roasting, cook the pasta in plenty of boiling salted water for about 15 mins (it should be al dente). Drain and return the pasta to the saucepan. Add the drained kale along with 2tbsp of olive oil and adjust the seasoning if required.
5. Cook over a medium heat until the kale has warmed through. Gently stir in the onions and cheese then drizzle with extra virgin olive oil if required and serve immediately.