Ooh, urm, not exactly!
How I used to make a potato bake was to cut up potatoes into slices about 1/2 cm thick, then put them in the dish in layers.
Make a simple white sauce (or buy one!) and then mix in whatever I wanted, usually cheese for me but you can put bacon, ham, chicken, anything really.
Then baked it for about an hour until the potatoes were soft.

But I have a feeling that's not what you mean..