Here's my Potato and Onion Bake recipe: there's a lot of room for adjustment according to personal preference!
Grease (or spray with Pam if you use it) a casserole dish - size is up to you, I usually use a larger than 2qt size
Peel and slice potatoes into dish, layering with sliced (and then separated into rings) onions
Repeat layers as often as you want (I usually end up with two layers of each, with the onions on top)
Melt 1/4c butter (though, I admit, I usually use 1/2 cup) and add: 1/4tsp pepper, 1/2 tsp salt, 1/4 thyme and 1/8 oregano
Drizzle butter mixture over potato layers
Cover and bake at 450. Usually takes an hour or so - depends on how thick your potato slices are.
It doesn't really sound like much, but it is tasty! It's quick and easy to make, too. I like to serve it with my broccoli-cheese soup, but have lately been told by DH and my mom that the two "don't go together"

so I will have to find a different main dish.
Kinsey