1. Brown the Beef & Onions
Preheat oven to 375°F and grease a 9x13-inch baking dish.
In a skillet, cook ground beef over medium heat until no longer pink.
Add onion and garlic, sautéing until soft (about 3-4 minutes).
Drain excess grease if needed.
2. Mix the Creamy Sauce
In a large bowl, whisk together cream of mushroom soup, sour cream, milk, Worcestershire sauce, paprika, thyme, salt, and pepper.
Stir in 1 ½ cups of shredded cheese until well combined.
3. Layer the Casserole
Spread half of the sliced potatoes in the baking dish.
Top with all of the beef mixture.
Add the remaining potatoes in an even layer.
Pour the cheesy sauce over everything, spreading evenly.
4. Bake to Golden Perfection
Cover with foil and bake for 45 minutes.
Uncover, sprinkle with remaining ½ cup cheese (and optional breadcrumbs or bacon).
Bake uncovered for 15-20 more minutes, until bubbly and golden.
5. Let Rest & Serve
Allow to cool for 5-10 minutes before serving (helps it set!).
Garnish with fresh parsley or green onions for a pop of color.
Serving Suggestions
🍽 Pair with – A crisp green salad, steamed veggies, or garlic bread.
🍽 Leftovers? – Reheats beautifully for lunch the next day!
🍽 Freezer-friendly – Assemble (but don’t bake), freeze, and cook later.
Pro Tips for the Best Casserole
🔥 Extra crispy topping – Mix melted butter with breadcrumbs or crushed crackers before sprinkling on top.
🔥 Make it ahead – Prep the night before, refrigerate, and bake when ready.
🔥 Spice it up – Add diced jalapeños or hot sauce for a kick.
🔥 Vegetarian twist – Swap beef for lentils or mushrooms.
