Preheat oven to 350 F.

Wash potato and poke with fork, oil the potato.

Place on the pan and cook uncovered in the oven for approximately 60 - 90 minutes.

Check after 1 hour with a fork how soft is potato. If it's ready take it out.

In the frying pan melt butter and saute diced onions for 5 - 10 minutes. If the pan is to dry add a little more butter or water.

Add sliced mushrooms and saute for another 5 - 10 minutes. Season with salt and pepper.

In the pot cook 1 cup green beans according to the package.

When the baked potato is ready; cut in half. Add mushrooms,onions and shredded mozzarella cheese.

Bake for another 5 - 10 minutes until the cheese will melt.