Cheesy Potatoes - cooking recipe

Ingredients

8 -10 large potatoes, peeled and sliced about 1/4-inch thick
1 onion
1/2 cup butter
1/2 cup flour
8 cups milk
2 teaspoons salt
1 teaspoon pepper
2 lbs Velveeta cheese

Preparation

Saute butter and onions in a large pot until onions are clear. Whisk in flour until lumps are gone. Add milk slowly whisking the entire time to avoid lumps and cook until it thickens to a sauce. Remove from heat and add cheese and stir until lumps are gone. Arrange potatoes in a large roasting pan and pour cheese sauce over the top. Bake covered at 375 for 1 1/2 hours or until potatoes are cooked. When potatoes are cooked remove lid and cook for 30 minutes to brown the top.