New Orleans Mac and Cheese

Name: New Orleans Mac and Cheese
Ingredients: 2 tablespoons olive oil; 1 cup diced onion; cup diced celery; 3/4 cup diced bell pepper; 4 tablespoons unsalted butter; 1 teaspoon smoked paprika; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon garlic powder; 1/4 teaspoon ground cumin; 1 teaspoon Kosher salt; 1/4 cup all-purpose flour; 1 cup heavy cream; 4 cups milk; 8 ounces sharp cheddar cheese; 8 ounces Monterey jack cheese; 1 pound dry bucatini pasta; 1/4 teaspoon cayenne pepper, optional