Step 1 Preheat oven to 200°C. Boil or microwave cauliflower until tender.

Step 2 Combine 1/3 cup milk with cornflour in a bowl. Heat the remaining milk in a saucepan over a medium heat. Add cornflour mixture and mustard. Cook until sauce thickens. Add cheese and cauliflower. Gently stir to combine. Season to taste. Transfer to a baking dish and bake for 5-10 minutes.

Step 3 Meanwhile, spray a small frying pan with oil. Cook bacon for 4-5 minutes, stirring, until crisp. Add spring onions and cook for 1 more minute. Remove cauliflower from oven and scatter with bacon mixture. Serve with rolls and a salad.