A little bit of turmeric enhances the color here; it's a bit of a trick that makes you perceive the sauce as cheesier than it actually is.
Serves 6 (serving size: about 1 1/3 cups)
1. Preheat broiler to high.
2. Cook pasta according to package directions, omitting salt and fat. Add broccoli to pan during last 2 minutes of cooking. Drain.
3. While pasta cooks, place bacon in a large ovenproof skillet over medium-high heat; cook 4 minutes or until browned, stirring occasionally. Remove bacon from pan with a slotted spoon; reserve 1 1/2 teaspoons drippings in pan. Sprinkle chicken with 1/4 teaspoon salt. Add chicken to drippings in pan; cook 4 minutes. Sprinkle with garlic; cook 2 minutes, stirring occasionally. Sprinkle with turmeric; cook 30 seconds, stirring frequently.
4. Combine remaining 3/4 teaspoon salt, milk, stock, and flour, stirring with a whisk. Add milk mixture to pan; bring to a boil, stirring frequently. Cook 2 minutes or until thickened. Add pasta mixture and 2 ounces cheese; toss to coat. Sprinkle with remaining 3 ounces cheese and bacon. Broil 2 minutes or until cheese melts and just begins to brown.