We've served this for so long, I can't remember when I found the recipe... when we lived in Iowa I think.
1 pound ground beef
2 large jars salsa
1 pound Velveeta
Brown the ground beef, pour off excess grease.
Place ground beef, salsa, and Velveeta in Crock Pot and set to "high". Switch to "low" when Velveeta has melted.
-- or --
After pouring off excess grease, add salsa and Velveeta to the ground beef and stir (on low temp) until cheese has melted. Then pour into Crock Pot and keep on "low" until ready to serve (this is much faster than letting the cheese melt in the Crock Pot as above).
I serve it in the Crock Pot and have people ladle it into bowls and serve it with big corn chips.