Cook the pasta according to the packet instructions, drain and keep warm.
Meanwhile, slice the garlic, then gently sauté it in the oil, together with the chilli flakes.
Rinse the spinach and add to the garlic. Add a couple of spoonful of the pasta’s cooking water, then put a lid on and steam for about 5 minutes over low heat.
When the spinach has wilted, transfer it to a small food processor, add the walnuts, parsley and the vegan feta, then blend until you get a slightly textured sauce. Season with salt and pepper, then mix with the pasta.
Fold in the rocket leaves, then serve immediately, garnished with chopped walnuts and crumbled feta.