Step 1

Preheat the oven to 375

Step 2

Allow hash browns to thaw overnight in the fridge before using

Step 3

Grease a 3 quart casserole dish and set aside

Step 4

In a skillet, add garlic and onion with a drizzle of olive oil and cook until soft, around 10 minutes

Step 5

In a large bowl, mix hash browns, cream of mushroom soup, onion and garlic, sour cream, butter, salt, pepper, and 1 cup of the cheese

Step 6

Stir until well combined then transfer to casserole dish

Step 7

Top the hash brown casserole with the remaining cheese

Step 8

Bake at 375 minutes for 40 - 45 minutes, until browned and bubbly