In a skillet over medium heat, brown the ground beef along with the diced onion and minced garlic, stirring until the beef is cooked through and the onions are translucent. Drain any excess fat.
In a large bowl, combine the cream of mushroom soup, beef broth, Worcestershire sauce, dried thyme, and salt and pepper. Mix well until combined.
In a greased crockpot, layer half of the sliced potatoes at the bottom. Spoon half of the beef mixture over the potatoes, and sprinkle half of the shredded cheddar cheese on top.
Repeat the layers with the remaining potatoes, beef mixture, and top off with the remaining cheddar cheese.
Cover the crockpot and cook on low for 6-7 hours or high for 3-4 hours, until the potatoes are tender and the cheese is melted and bubbly.
Once cooked, sprinkle chopped fresh parsley on top before serving.
Notes
Spoon the casserole into individual bowls and garnish with a sprinkle of freshly chopped parsley for a pop of color. Serve with crusty bread for a hearty meal.