Poke a few holes in the potatoes and nuke (or bake in a 205°C oven) until fork-tender. Add to a large bowl and smash with a potato smasher.
Immediately add the softened butter, cheese, sour cream, bacon and spring onions, and stir with a rubber spatula. Add salt and pepper to taste. Add the French fried onions and fold in. Serve hot, sprinkling on extra green onions.
Yummy with grilled steak or chicken.