Creamy Chicken and Broccoli Soup

Name: Creamy Chicken and Broccoli Soup
Ingredients: 2 Tbsp. extra-virgin olive oil; 2 Tbsp. unsalted butter; 1 medium carrot, peeled, coarsely chopped; 1 celery stalk, thinly sliced; 3 garlic cloves, coarsely chopped; ½ tsp. Diamond Crystal or ¼ tsp. Morton kosher salt, plus more; 2 Tbsp. all-purpose flour; 4 cups low-sodium chicken broth; 1 6–7.3-oz. box white cheddar & shells mac and cheese (such as Annie’s or Kraft); 1 medium skinless, boneless chicken breast (about 8 oz.), cut into bite-size pieces; ½ medium head of broccoli (about 5 oz.), coarsely chopped; 1 Tbsp. Worcestershire sauce; Freshly ground pepper