Cauliflower and Broccoli gratin

Directions

1. Cook the cauliflower in boiling water for 5-6 minutes, adding the broccoli for the last 3-4 minutes.
2. Meanwhile, place the Flora, flour and milk in a saucepan, and, stirring continuously, bring to the boil. Simmer for 2-3 minutes until thickened and smooth.
3. Stir the mayonnaise, mustard and half the cheeses into the sauce, and season with black pepper.
4. Drain the vegetables and place in an ovenproof dish. Pour over the sauce, and sprinkle with the remaining cheese.
5. Place under a hot grill until golden brown and bubbling.