Game Day Burgers

1 Large potato, peeled & shredded (Or frozen hash brown, thawed)
1 Cup shredded Swiss cheese
1 Cup fresh mushrooms, chopped
2 Pounds lean ground beef
2 (1 oz) Packages dry onion soup mix

Preheat grill for high heat.
In a medium bowl, mix together potato, cheese, and mushrooms.
In a large bowl, mix ground beef with onion soup mix. Form into 6 large burger patties. Make a pocket in each burger, stuff with potato mixture, and seal.
When ready to grill, brush grate with oil; cook burgers over high heat for 5 minutes on each side, or until well done. Serve hot.