Chop the cauliflower into florets. Boil them in how water for 10 minutes until soft. (You can use the same water for the pasta or cook it separately). Soak the cashews in boiling water.
Add the boiled cauliflower to a blender, together with cashews, olive oil, nutritional yeast, oat milk, salt, pepper and lemon juice. Blend until smooth.
Mix in with the pasta, top with some lemon zest and optionally toasted breadcrumbs. Enjoy with your favourite kind of pasta!