Hearty gluten free vegetarian lasagne

Name: Hearty gluten free vegetarian lasagne
Prep time: 1 h
Cook time: 3 h 5 min
Total time: 3 h 5 min
Yield: 8 portions
Ingredients: 150 g lupin flour; 70 g gluten free cornflour; 1 ½ tsp xanthan gum; 1 pinch ground nutmeg; 1 tsp salt; 2 eggs; 60 g water; 2 celery stalks; 2 - 3 carrots; 3 garlic cloves; 1 brown onion; 4 - 5 sprigs fresh flat-leaf parsley; 20 g olive oil; 200 g button mushrooms; 2 tsp dried mixed herbs; ½ tsp ground nutmeg; 2 tsp Vegetable stock paste; 120 g dry red wine; 400 g canned whole tomatoes; 1 tbsp tomato paste; 2 tsp raw sugar; 1 tsp salt; 2 tbsp gluten free cornflour; 3 tbsp water; 60 g Parmesan cheese; 100 g mozzarella cheese; 100 g unsalted butter; 80 g gluten free flour mix; 600 g full cream milk; 1 pinch ground nutmeg