frozen meatballs directly on top of the potatoes, distributing them so they’re in a mostly single layer. Do not thaw the meatballs first; they go in straight from the freezer.
In a medium bowl, whisk together the condensed cream of mushroom soup, beef broth, and dry onion soup mix until mostly smooth. This mixture will become the savory gravy for the stew.
Pour the soup mixture evenly over the meatballs and potatoes, gently nudging with a spoon so most of the meatballs and potatoes are coated. Do not stir vigorously;
