Step 1

Preheat the oven to 375 degrees Fahrenheit

Step 2

Layer the ingredients in a baking dish:  Get out a baking dish and grease it with either butter or cooking spray.  I used an 8x6 sized baking dish for this recipe, but you can use any size.   Just understand that the larger the dish the more potatoes and onions you are going to need.  Once it's greased you will want to layer each ingredient until you have used all of the potatoes and onions.  To layer them first place down some of the sliced potatoes. Then sprinkle on some flour, let's say a tablespoon or two, along with some salt and pepper to taste.  Then place down some of the sliced onion.  If you love onion then put more, if you don’t then put less.  Then cut up some butter into small chunks, you will probably need about 1 to 2 tablespoons for each layer. Finally put some of your cheese over all of this Again just like the onions, if you don’t like cheese then add a little if you love cheese then add a lot. Once you have the first layer complete, continue layering in this manner until you have either used up all of your potatoes, or you have reached the top of your baking dish.  Make sure that the last layer is just potatoes, and salt & pepper. Now that each layer has been assembled, pour either warm milk or half and half over the layers until it reaches just below the top layer of potatoes. As you can see the amount of flour, butter, cheese, and milk/half & half, can vary significantly.  You simply will have to follow your best judgment the first couple of times.  And eventually, you will feel comfortable with the amounts you need.

Step 3

Bake the dish:  Cover the dish with aluminum foil, and bake in the oven for about 45 minutes.  Then after 45 minutes take the dish out and check the doneness of the potatoes.  To do this simply take a fork and poke the potatoes.  If it easily goes through then they are cooked if they don’t then put the foil back on and cook them a little more.  If the potatoes are done then move on to the next step.

Step 4

Top with more cheese:  Sprinkle the dish with another layer of cheese.  As per the rest of this dish if you like it really cheesy then add a lot, if you don’t then add a little.  Then return the dish to the oven without the aluminum foil covering it.   Let it bake for another 10 to 15 minutes, or until the cheese is melted to your liking.  Lastly, take the dish out of the oven and let it cool for a couple of minutes