In a large pot, melt 2/3 c butter; stir in 2/3 c. flour, 3/4 tsp salt, 1/2 tsp pepper. Stir until smooth, for about 2 minutes. Gradually add 7 cups milk, stirring constantly until thickened. Add about 4 cups baked potatoes, cubed, and 4 green onions, sliced. Bring to a boil, stirring constantly. Reduce heat and simmer for 0 minutes. Add 12 strips cooked crumbled bacon, 1 c. sour cream, and 1 1/4 c shredded cheddar cheese. Stir until the cheese is melted. Serve immediately. Makes 2 1/2 quarts, to serve about 8.
