This comforting casserole is perfect for a family dinner. Start by browning ground beef in a skillet. Add diced onions, garlic, and sliced mushrooms and cook until softened. Then, stir in canned diced tomatoes, tomato paste, and beef broth. Simmer until the sauce thickens. Layer sliced potatoes in a baking dish and pour the beef mixture over the top. Bake until the potatoes are tender and the top is golden brown.
