Crawfish Mac and Cheese

Name: Crawfish Mac and Cheese
Ingredients: 2 1/2 cups milk, divided; 1 large onion, chopped and divided; 1 bay leaf; 12 ounces uncooked tube-shaped pasta; 2 cups crawfish tail meat; 2 tablespoons chopped garlic; 3 tablespoons all-purpose flour; 3/4 teaspoon salt; 3/4 cup shredded Fontina cheese; 1/2 cup shredded Gruyere cheese; 2 teaspoons truffle oil or extra virgin olive oil; 1/2 cup Panko breadcrumbs; 2 tablespoons grated parmesan cheese; 1 teaspoon garlic powder; 1 tablespoon olive oil; 1/2 teaspoon red cayenne pepper (optional)