In a Dutch oven or large kettle, cook potatoes in boiling salted water until tender. Cool completely; shred and place potatoes in a large bowl. Add 1 cup cheese and onion. Combine remaining ingredients; pour over potato mixture.
Preheat oven to 350 degrees. Great 2 1/2 quart baking dish.
Spoon potato mixture into prepared baking dish. Sprinkle with remaining cheese. Bake, uncovered, in preheated oven for 35-40 minutes or until bubbly. Makes 8-10 servings. Enjoy!