On a diet but craving a satisfying pie? Weight Watchers' chicken and mushroom pie recipe is a guilt-free treat at only 353 calories per slice. This hearty pie serves 4 people and takes around 50 mins to make. It's a family favourite and once you've made it you'll be whipping this delicious comfort food over and over again. We just love how this pie takes and looks just like a classic chicken and mushroom pie but just misses out on the calories. This recipe shows you how to make the low-fat pastry from scratch as well a tender chicken filling infused with garlic and packed with plenty of veggies.