Heat oven to 400°F. Spray 12x8-inch (2-quart) glass baking dish with cooking spray. Cut all potatoes into 1/8-inch-thick slices. Layer half of potatoes in baking dish. Top with half of the Swiss cheese. Cover with remaining potatoes.
In medium saucepan, place broth, rosemary, pepper and garlic. Heat to boiling. Pour boiling broth over potatoes. Loosely cover with sprayed sheet of foil. Bake 45 minutes.
Remove baking dish from oven. Uncover dish; sprinkle with remaining half of cheese.
Return to oven; bake uncovered 15 minutes longer or until potatoes are tender and cheese is melted.