Lasagne bolognese

Name: Lasagne bolognese
Prep time: 40 min
Cook time: 2 h 30 min
Total time: 3 h 10 min
Cuisine: European, Italian, Mediterranean
Ingredients: 100 - 200 g Parmesan cheese, cut into pieces (3 cm); 200 g mixed vegetables (celery, carrots, onions), cut into pieces; 40 g extra virgin olive oil; 800 g mixed minced meat (400 g pork, 400 g beef); 100 g dry white wine; 400 g canned crushed tomatoes; 1 - 1 ½ tsp salt, to taste; ½ - 1 tsp ground black pepper, to taste; 1000 g milk; 80 g butter, softened; 100 g plain flour; 1 tsp salt; 1 - 2 pinches ground nutmeg; butter, for topping; 250 g dried lasagne sheets, approx. 12 sheets