This Chicken Shepherd's Pie is a comforting and hearty dish featuring a creamy chicken and vegetable filling topped with fluffy mashed potatoes and a sprinkle of Parmesan cheese. Perfect for using up leftover chicken and vegetables, it’s a quick and satisfying meal that’s easy to prepare. Broiled to golden perfection, this recipe is a family-friendly favorite for busy weeknights or cozy dinners!
Make the mashed potatoes: For the stove top - Boil a large pot of salted water on the stovetop. Add in potatoes and cover, cooking for 15 minutes or until potatoes are tender. Drain.
Add in ½ cup milk, salt and pepper and 1 tbsp butter. Mash until smooth. Set aside.
For the Instant Pot version: Add the potatoes to the Instant Pot with 1/2 cup chicken broth. Seal the pot and set to cook on manual for 12 minutes.
When done, do a quick release. Remove the lid and mash potatoes with a potato masher. Add in the butter and milk and continue mashing to the consistency you desire.
For the chicken gravy base: In a large skillet, melt 1 tbsp butter over medium heat. Add onions cook for about 5 minutes. Add in the garlic and cook for 1 minute. Stir in flour.
Whisk in milk, Dijon mustard, lemon juice, and rosemary. Continue to whisk constantly until it reaches a thick consistency. Add in chicken and frozen vegetables and stir for another 3 to 5 minutes.
Spread chicken mixture in a 9-inch square baking dish. Spread mashed potatoes on top. Sprinkle on Parmesan cheese.
Broil for about 5 minutes or until cheese melts. Serve hot. Serves 6.