Creating Beef and Potato Casserole is straightforward if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook the Beef: In a skillet, heat olive oil over medium heat. Add ground beef, chopped onion, and minced garlic. Cook until the beef is browned, about 5-7 minutes. Drain excess fat.
3. Add Seasoning: Stir in thyme, salt, and black pepper to the cooked beef mixture. Mix well and set aside.
4. Layer the Potatoes: In a greased baking dish, arrange half of the sliced potatoes as the first layer, overlapping slightly.
5. Add Beef Mixture: Spread half of the cooked beef mixture over the layer of potatoes.
6. Repeat Layers: Create a second layer with the remaining potatoes and finish with the remaining beef mixture.
7. Make the Sauce: In a bowl, combine the cream of mushroom soup and beef broth. Mix until smooth.
8. Pour Sauce: Carefully pour the soup mixture evenly over the casserole.
9. Cover with Foil: Cover the baking dish tightly with aluminum foil.
10. Bake: Place in the preheated oven and bake for 45 minutes.
11. Add Cheese: Remove the foil, sprinkle cheddar cheese on top, and return to the oven. Bake for an additional 15 minutes, or until cheese is melted and bubbly.
12. Cool: Once done, let it cool for about 5-10 minutes before serving.

These detailed steps will guide you in crafting an incredible Beef and Potato Casserole that will make your meal come alive with aroma and flavor.