Gratin de Pomme de Terre et Saucisson

My first concoction from Julia's book! Luckily I found this on the internet. There are MANY variations on this recipe, but I'm confident I found her original one. The name is fancy, but this is basically polish sausage with potatoes, eggs, onions, and cheese. And let me tell you....it.was.DELISH.

2/3 cup minced onions
4 tablespoons butter
1/2 pound Yukon Gold potatoes
1 package of pre-cooked Kielbasa, Hillshire Farms or similar
4 eggs
1 1/2 cup whipping cream
1/2 teaspoon salt
1/8 teaspoon pepper
Swiss cheese (I went to the deli and had them slice 1/2 pound - about 8 slices)

Fill a saucepan with 3 quarts of water over high heat and bring to a boil. While waiting for the water to boil, peel and slice the potatoes, and slice and Kielbasa. When the water is boiling drop in the potato slices and cook for 6-8 minutes until barely done. Remove them from the heat, let drain and cool a bit.

Melt 2 tablespoons butter in a saucepan over medium-high heat. When melted, add the onions and saute until tender but not browned, about 5 minutes.

Preheat the oven to 375F.

Coat a baking dish with butter, oil, or non-stick spray. Spread half the potatoes in the bottom. Distribute half the onions over the potatoes. Spread half the Kielbasa over that. Then do it again: spread the remaining potatoes over the dish, followed by the onions and Kielbasa.

Put the four eggs into a mixing bowl along with the cream. Add the salt and pepper. Beat until slightly thickened. Pour it over the potatoes and sausage. Lay the cheese over the potatoes and sausage. Cut the remaining 2 tablespoons of butter into 8 portions and distribute them evenly over the top of the cheese.

Bake for 40 minutes in the upper third of the oven until the cheese is nicely browned.