Here's the Quick and Dirty..
Preheat the oven to 400F. Pierce the potatoes with a fork; bake at 400 for 1
hour until tender. Cool. Peel the potatoes; coarsely mash
Lightly spoon the flour into a dry measuring cup; level with a knife. place
flour in a medium pot; gradually add milk, stirring with a whisk until
Cook over medium heat until thick and bubbly (about 8 minutes). Add mashed
potatoes, 3/4 cup cheese, salt and 1/2 teaspoon pepper, stirring until cheese
melts. Remove from heat.
Stir in sour cream and 1/2 cup green onions. Cook over low heat 10 minutes
or until thoroughly heated (do not boil). Ladle 1/2 cup soup into each bowl.
Sprinkle with cheese, green onions, and about as much bacon as you want. (So good with vegetarian bacon strips too... promise.)