Healthy seafood gratin

1 Heat the oven to 200°C/fan 180°C/gas 6. Cook the pasta according to the pack instructions. Drain, then set aside.

2 Meanwhile, heat the oil in a non-stick frying pan, then gently fry the onion for 2 min. Add the mushrooms and fry for 5 min or until the liquid is reduced. Add the asparagus and fry for 3 min. Set aside.

3 Melt the spread in a saucepan over a low heat. Add the flour with a pinch of white pepper and cook for 1 min. Raise the heat to medium, then gradually pour in the milk, stirring. Simmer and stir until the sauce is smooth and thickened. Add half the parmesan and stir until melted.

4 Spray an ovenproof dish with oil. Spread a third of the veg over the base, then top with all the seafood or crab, then the pasta. Add most of the remaining veg, then drizzle over a little of the white sauce. Top with the rest of the veg, sauce and parmesan. Bake on the top oven shelf for 20–25 min. Garnish with parsley and serve with salad leaves.