Place potato chunks in a large pot. Fill with enough water to cover the potatoes. Bring to a boil. Cook over medium heat for 15 to 20 minutes or until tender. Drain. Preheat the oven to 350 degrees. Grease a 2 1/2-3 quart casserole dish. Return potatoes to the pot. Add evaporated milk, sour cream, salt and pepper. Beat with a hand held mixer until smooth. Stir in 1 1/2 cups of cheddar cheese and half of the bacon. Spoon the potato mixture into prepared casserole dish. Bake for 20 to 25 minutes or until heated through. Top with remaining 1/2 cup cheddar cheese, remaining bacon and green onions. Bake for an additional 3 minutes or until the cheese has melted.
Go to full version of