The Original Mexicali Dip

This is the original Foley favorite Mexicali Dip that we have been serving continuously since the late 70's.  

1 lb. Velveeta Cheese Spread, cubed
1 16 oz. can tomatoes, drained, chopped
1 4 oz. can green chilies, drained chopped
1 tablespoon instand minced onion
Tortilla chips

Combine Velveeta, tomatoes, chilies and onion in a saucepan; cook over low heat until cheese melts.