1. Preheat oven to 350 degrees F. Bake potatoes until done. Let them cool for at least 1/2 hour, so you can handle them. You could also use leftover potatoes, or bake ahead of time, it is just easier to mash them when they are still warm.
2. Saute the onion in the margarine until translucent, add ham and saute for a few more minutes. Take off heat.
3. Cut potatoes in half lengthwise, and scoop out as much of the potato as you can without trashing the skin. Add salt and pepper and mash potato with masher or whisk until most of the lumps are out.
4. Add ham and onions, nutritional yeast, sour cream, sliced green onions and milk. Adjust salt and pepper as desired. You do not want this too stiff, so add more sour cream, margarine or milk until the filling is like a thick mashed potato.
5. Fill potato skins and bake for about 30 minutes, or until nicely browned on top. Garnish with chives, if desired. If you make them ahead and bake from cold, you might need more baking time. You could also make these and freeze.
Source of recipe: I wrote this recipe for a family dinner to go with the prime rib the rest of the folks are eating. I wanted to make a very unvegan tasting potato. Perfect for when you want to fool someone! Or if you just want to make a side for your meal. I suppose this with a salad is a meal.