In a large skillet, brown the ground beef over medium-high heat until no pink remains, drain off the excess liquid and remove the beef to a medium-sized bowl. In the same skillet, combine the water, frozen vegetables, ramen noodles (including the seasoning packets), and the ginger. Bring the mixture to a boil, then reduce the heat to low and simmer for 3 minutes, or until the noodles are tender, stirring occasionally. Return the beef to the skillet and add the scallions. Cook until warmed through.