Cook the Beef Base

In a large skillet, sauté the ground beef with the diced onion and minced garlic until the meat is fully browned. Drain any excess grease. Add 1 packet of taco seasoning plus 1/3 cup water, stir well, and let it simmer briefly to coat the meat.

Build the Casserole in the Crockpot

Pour the cooked beef mixture into your slow cooker. Add the frozen potatoes, the second packet of taco seasoning, cream soup, salsa, and 2 cups of shredded cheese. Stir everything together until well combined.

Add the Cheese Layer

Sprinkle the remaining 2 cups of cheese evenly over the top of the mixture.

Slow Cook

Cook on LOW for 3 to 4 hours or on HIGH for 2 to 3 hours. The casserole is ready when the potatoes are tender all the way through. Exact cooking time may vary by slow-cooker model.

Serve

Spoon the casserole into bowls. Top with your favorite garnishes such as sour cream, green onions, jalapeños, cilantro, or tortilla chips.