Instructions:
- Preheat oven to 400° and spray a 14 x 11½ x 2¼ baking dish with a non-stick spray. Set aside.
- Peel and thinly slice potatoes, approximately ⅛” thick. Place in a large bowl until ready to use.
- In a large frying pan, melt butter over low flame then add onions and garlic.
- Saute for about 4-5 minutes.
- Sprinkle flour over the onion mixture, stir, and cook for a couple of minutes.
- Gently pour vegetable broth into the pan and stir, add salt and pepper, seasoning, and heavy cream.
- Stir until thickened, remove from heat just before boiling, and then add 2 cups of cheddar cheese. Stir.
- Layer ⅓ of the potato slices in a baking dish then add ⅓ of the sour cream and ⅓ of the cheese sauce over the potatoes.
- Top with ⅓ of the Parmesan, ⅓ pepper jack cheese, and ⅓ of cheddar cheese.
- Repeat layering 2 more times ending with cheddar cheese.
- Cover with foil and place in oven.
- Cook for 1½ – 2 hours.
- About 15 – 20 minutes before the potatoes are done, remove the foil to brown the cheese a bit.
- Remove from oven, let sit for about 15 minutes, then enjoy.