Spicy Sausage Macaroni and Cheese

Name: Spicy Sausage Macaroni and Cheese
Prep time: 10 min
Cook time: 1 h
Total time: 1 h
Yield: 6 portions
Ingredients: butter, unsalted; 450 g Italian sausage, any type; 115 g Asiago cheese, aged; 170 g Cheddar cheese, vintage; 170 g Pepper Jack cheese; 1275 g water; 315 g pasta, dried, type macaroni; 1 tbsp extra virgin olive oil; 115 g heavy cream, 35% fat; 1 jalapeño pepper; 1025 g whole milk; 85 g all purpose white flour; salt; white pepper, ground; ½ tsp nutmeg, ground