This recipe was originally from www.thekitchn.com/recipe-potato-squash-and-goat-90647 entitled: Potato, Squash, and Goat Cheese Gratin. It looked good but I was missing some things and frankly, I don't like goat cheese (yes I try it over and over and still come to the same conclusion). So I changed it and it came out great! But if you like goat cheese (bleck) maybe you should try the original and see how it goes. As mentioned in her post, you're going to want a mandolin. There is one on Amazon for only $20 that gets great reviews. After giving myself carpal tunnel making this the first time, I decided to buy one myself. As for my version, here is:
Potato, Squash, and Cheese Gratin
9x12 serves 6-8
4-6 small/medium yellow squash (large squash are bitter)
6-8 red potatoes
1 small/medium red or Vidallia onion (optional)
1/3 cup olive oil
8oz sharp cheddar, graded (again, Cabbot Seriously Sharp is my favorite)
4oz (or more if you like) cream cheese
1/2 cup milk (don't use skim - if that is all you have, half/half or cream can be used)
Preheat oven to 400.
Use a mandolin or chef's knife to cut the squash, potatoes, and onion very thin - 1/8inch or less - and as evenly as possible. Place in a large bowl. Pour olive oil over the sliced veggies and stir or toss to coat.
Layer in 9x12 pan that has been sprayed with non-stick oil - sliced veggies, dots of cream cheese over the whole pan (2oz) (take two spoons, get some on one spoon and push off dots with the other spoon), layer of 1/3 of the cheese. Sliced veggies, dots of cream cheese (2oz), layer of cheese (1/3 of the cheese). Layer of veggies, last of the cheese.
Pour milk over the whole dish. Bake for 45 minutes or until the cheese is bubbling and brown. Serve warm. Left overs don't fair that well just so you know. So eat up!