|Ground beef||1 Pound|
|Chopped onion||1⁄2 Cup (8 tbs)|
|Canned condensed tomato soup||10 3⁄4 Ounce|
|Water||1⁄4 Cup (4 tbs)|
|Prepared mustard||1 Tablespoon|
In skillet cook ground beef and onion till meat is browned.
Drain off fat.
Stir in soup, water, mustard, salt, and pepper.
Simmer, uncovered, for 2 to 3 minutes.
Split and toast buns; serve meat mixture on buns.