Hamburger Pie Casserole with Creamy Roasted Garlic Mashed Potatoes is a comforting and delicious dish that combines the flavors of a classic hamburger with the creamy goodness of mashed potatoes. The casserole is made with ground beef, onions, and a savory tomato sauce, topped with a layer of creamy mashed potatoes that are infused with roasted garlic. It's the perfect comfort food for a cozy dinner at home.