Creamy Fish and Vegetables

30g butter 1 leek, pale section only, thinly sliced 2 garlic cloves, crushed 2 tbsp plain flour 3 tsp Dijon mustard 300ml light thickened cream 1/2 cup (125ml) chicken or fish stock 600g firm white fish fillets, cut into 3cm pieces 450g frozen broccoli, carrot, cauliflower mix 1 cup (70g) coarse breadcrumbs (made from day-old bread) 100g haloumi, grated 1/2 cup (60g) grated tasty cheddar Step 1 Melt butter in a large heavy-based ovenproof frying pan over medium heat. Add leek and garlic. Cook, stirring, for 2-3 mins or until softened. Add flour. Cook, stirring, for 1 min or until mixture is grainy. Stir in mustard. Gradually stir in the cream and stock. Step 2 Bring to the boil. Reduce heat to low. Cook for 2 mins. Add fish and cook for 2-3 mins or until fish is cooked through. Add the frozen vegetables. Season. Simmer for 1-2 mins or until vegetables are heated through. Step 3 Preheat grill on medium...