Mushroom Sloppy Joes

I know, I know: This picture looks NOTHING like sloppy joes. Ha! Since I don't have a picture of the finished product, I have put of a picture of the contributor of this recipe. This is my uncle; and this is his mom's recipe (with a little Wilde tweek).

1 lb ground beef
1/2 onion chopped
1/2 cup of sliced mushrooms
1 can cream of mushroom soup
1 package hamburger buns

In large skillet, cook onion and mushrooms until just brown. Add ground beef and cook until no pink remains. Drain off excess grease. Mix in the soup and heat thouroughly. Serve on hamburger buns. Watch out, these are yummy!