Roasted Cauliflower and Beetroot Pasta
1 large beetroot, peeled200g cauliflower florets40g walnutsOlive oil1 red onion, thinly sliced2 large garlic cloves, sliced4 leaves cavolo nero (or 2 handfuls kale), de-stemmed and roughly chopped1 tbsp nutritional yeast1 tsp vegan butter or butter1 tbsp pomegranateSalt and black pepper2...