Heat 1/4 cup of lard in a skillet and cook Possum meat until golden.
Transfer the Possum to a baking dish, and bake at 350°F for 30 minutes.
In a stock pot, combine Possum meat, water, and salt. Boil.
Reduce heat, simmer for 6 hours, then debone the Possum.
Clean the pot, return the meat, and prepare for stew.
Add sliced potatoes, celery, and carrots to the pot. Cover with water.
Melt 1/4 cup of lard in a cast iron skillet.
Sauté onions until translucent, about 15 minutes.
Place cooked onions in the stock pot.
Bring to a boil, cover, and simmer for 40 minutes until vegetables are done.
Add stewed tomatoes, beef gravy, and cream of mushroom soup.
Bring to a boil, simmer for ten minutes, then enjoy!