Answer
Open the specific Quick Report's dialog from the Quick Reports overview screen, and use the 'Add to Navigator' button in the bottom-left of that dialog to add it as a Navigator item. Once it's in the Navigator, you can create a normal shortcut against that navigator entry the same way you would for any other navigator item, giving direct one-click access straight to that Quick Report's own parameter/run dialog — or simply use the Navigator entry itself instead of a separate shortcut.