In a med mixing bowl combine mashed potatoes, egg and 2 tbsp of butter until well blended. This is your sweet potato topped chicken & mushroom pie There are three layers here: one is with crisply fried chicken breast, then a spinach layer follows, just before a mushroom and bacon mixture in added over. I served it with green beans on the side and hot rolls with Irish butter. Top with the mashed sweet potato (reserve the pan) and sprinkle over the panko breadcrumbs. Add cream sauce to veggie/chicken/broth mix and stir well, turn heat to medium and simmer for about 2 minutes, adding salt and pepper and seasonings to taste. Roast for 20 minutes, or until tender, and then set aside to cool. Add the pie filling to an oven-proof dish. Season with salt and pepper to … This Chicken, Leek, and Mushroom Pie makes a lovely centerpiece for a family Sunday dinner. Put the dish in the oven and cook for 10-15 min or until golden and bubbling. A crispy phyllo topping makes the dish lighter. Put the Portobello mushrooms on a baking tray and season with salt and pepper. For tonight's dinner, you may want to try this rich chicken pie topped with a warm crust of potato mash. Chicken, Leek, and Mushroom Pie - a lovely, savory pie with a chicken, leek, mushroom and potato filling. Remove from heat. Preheat the oven to 200C/400F/Gas 6. Everything is topped with a generous layer of mashed potatoes and finally baked to perfection! Click To Tweet Method.