I came across something in the commissary today that might work here: foil wrapped fully cooked ground beef in two seasonings -- lightly or Mexican. It's equivalent to what you would get from cooking 1 lb fresh ground beef. I bought one to check it out, and I have until 03/29/2005 to eat it. It weighs 10.6 oz -- which might be more than you want -- but it would pack well (approx 5" X 7" X 1/4 ").
Jack Link, himself, tells us: "My new full coooked ground beef is fully drained and ready to eat, with no messy clean up. I guarantee the same goodness and flavor as ground beef prepared in your own kitchen. Just pour it into your favorite meal and heat. Premium quality, great taste & convenience -- you have my word on it." What more could you ask?