Vegetable gratin

Step 1
Preheat oven to 190°C. Grease an 18 x 28 cm shallow baking dish with oil.

Step 2
Drain thawed vegetables well and set aside.

Step 3
In a bowl, whisk the flour and mustard into the milk.

Step 4
Melt the margarine in a saucepan over medium heat. Add the garlic and thyme and cook for 30 seconds.

Step 5
Gradually add the milk and cook, whisking constantly, for 5 to 10 mins or until thickened.

Step 6
Remove from the heat and stir in ¾ cup of the cheese until melted. Fold in the vegetables and pour into the baking dish.

Step 7
In a bowl, combine the remaining 1/4 cup of cheese with the breadcrumbs and parsley if using. Sprinkle over the vegetables and bake for 20 min or until golden brown.