Step 1 Preheat oven to 180°C.
Step 2 Melt 20g butter in a small saucepan over a medium heat.
Step 3 Add 1 Tbsp plain flour, stirring for 1 minute or until mixture is bubbling. Whisk in ½ cup milk until smooth.
Step 4 Add 185ml Ranch Dressing and extra 1 cup milk.
Step 5 Cook, stirring, until mixture boils and thickens. Transfer to a large mixing bowl.
Step 6 Add 6 cups cooked macaroni, 2 cups each shredded cooked barbecue chicken meat and chopped baby spinach leaves, 1 cup shredded mozzarella and 6 chopped, pan-fried bacon rashers.
Step 7 Toss well, then spoon into a large baking dish.
Step 8 Scatter with extra ½ cup shredded mozzarella. Bake for 20 minutes then serve.