Step 1

Preheat oven to 350 degrees. In a medium sized skillet, add 2 Tablespoons butter and sauté until the onions are translucent. Add the garlic and cook until fragrant. Remove from heat and set aside.

Step 2

In a large bowl, mix together the cooked onions, garlic, hash browns, condensed soup, sour cream, parmesan cheese, salt, pepper, and 1 1/2 cups cheddar cheese.

Step 3

Spread into a 9x13 inch baking pan. Top with remaining 1/2 cup cheddar cheese.

Step 4

Melt the remaining 4 Tablespoons of butter and mix with the crushed cornflake crumbs. Sprinkle evenly over the top of the casserole.

Step 5

Bake for 50-60 minutes or until cooked throughout and bubbly.