Preheat oven to 200°C (400°F)
Boil the pasta and cauliflower until tender
Reserve a little pasta water, then drain everything
Transfer the cooked pasta and cauliflower to a baking dish
Add cream cheese, grated cheddar and the reserved pasta water, then mix well
Sprinkle more grated cheddar on top
Bake for 15–20 minutes until golden and crispy on top
Serve warm