Preheat oven to 350. Combine first nine ingredients, and only four green onions, and four slices bacon in a large mixing bowl. Beat at medium high speed until smooth. Fold in one cup shredded cheddar cheese. Spoon into a lightly greased 9x13 inch baking dish; top with remaining green onions, bacon, and cheddar cheese. Cover and bake at 350 for 30 minutes. Uncover and bake 5 more minutes or until cheese melts.