Potatoes: Preheat oven to 450. Toss potatoes in zip bag with olive oil, garlic salt and pepper. Place on baking sheet and bake 40 minutes. Burgers: Combine dry soup, ground chuck and 1/4 c water in a large bowl; shape into 8-12 thin patties. Place 2 T cheese in center of 4-6 patties. Top with remaining patties; pinch edges to seal. Broil until done. Top with extra cheese to melt, if desired. Serve on buns with desired condiments.