Amish Breakfast Casserole

1 pound sausage
2 cups shredded cheddar cheese
1 medium onion, chopped
1 ½ cups small curd cottage cheese
6 eggs, lightly beaten
1 ¼ cups shredded Swiss cheese
4 cups frozen shredded hash brown, thawed

In large skillet cook sausage and onion until sausage is cooked through. Drain. In a bowl combine remaining ingredients. Stir in sausage mixture. Transfer to a greased 13x9 baking dish. Bake, uncovered at 350 for 35-40 minutes or until set and bubble. Let stand for 10 minutes before cutting.