Make this leek bake for a side to your Sunday roast! Leeks are in season at the moment and the sauce is so and delicious. It really makes the perfect addition to a roast dinner! Creamy Leek Bake Ingredients 4 leeks, cleaned and chopped 30g olive oil 30g plain flour 500ml milk 30g grated cheddar cheese 30g grated Parmesan cheese 1 tsp Dijon mustard 1 tsp wholegrain mustard 3 tbsp bread crumbs 2 sprigs thyme Method 1. Preheat oven to 180°C 2. Add some of the olive oil to a pan and add the leeks an