Lobster and Pancetta Macaroni with Three Cheeses

Ingredients

• 1 lb cavatappi pasta
• 1 1/2 sicks unsalted butter plus 3 tablespoons
• 1 quart whole milk
• 8 oz extra-sharp cheddar cheese grated
• 8 oz mascarpone cheese
• 12 oz Gruyere cheese grated
• 1 lb poached lobster
• 1 teaspoon nutmeg
• 1 lb diced pancetta
• 1 lb lobster meat diced plus shell for stock
• 1 1/2 cups homemade breadcrumbs, load of Tuscan bread
• 1/2 cup flour
• 1/4 cup white wine
• 3/4 cup water