Smoky Chipotle and Cheddar Mac

Name: Smoky Chipotle and Cheddar Mac
Ingredients: 1 lb macaroni (or cavatapi corkscrew shaped pasta); salt; 1 tablespoon extra virgin olive oil (plus some for drizzling); 3⁄4 lb chorizo sausage, casing removed and diced; 2 cups diced fire-roasted tomatoes, drained; 1 small onion, finely chopped; 2 chipotle chiles in adobo, and their juices chopped (or 1 tablespoon ground chipotle chili); 3 tablespoons all-purpose flour; 3 cups whole milk; 1 cup chicken stock; 3 cups shredded smoked cheddar cheese