Buckwheat Lasagne

Name: Buckwheat Lasagne
Prep time: 45 min
Cook time: 1 h 40 min
Total time: 1 h 40 min
Yield: 8 portions
Ingredients: 400 g buckwheat flour; 120 g water; 2 medium eggs; ½ tsp fine sea salt; 60 g Parmesan cheese; 4 sprigs fresh parsley; 2 garlic cloves; 150 g onions; 100 g carrots; 15 g olive oil; 200 g fresh button mushrooms; 200 g sausage meat; 500 g beef mince; 100 g red wine; 800 g passata; ½ tsp fine sea salt; ½ tsp ground black pepper; 1 sprig fresh thyme; 1 bay leaf; 70 g buckwheat flour; 70 g unsalted butter; 700 g milk; 2 pinches fine sea salt; 3 pinches ground black pepper