Cube the Velveeta and add it to a large saucepan, along with the can of green chilies and tomatoes.
Heat over medium-low heat, stirring often, until the cheese melts into the tomatoes and green chiles.
Sprinkle in the taco seasoning and stir to distribute it evenly.
Add in the corn and black beans, and fold them in gently.
Heat until warmed through (1-2 minutes), then serve with corn chips or tortilla chips.
Notes
Slow cooker: Low 2-3 hours, High 1-2 hours.With ground beef: Brown 1 pound of ground beef in a skillet, then drain off any excess grease. Sprinkle in 1 package of taco seasoning (1-2 tablespoons) and add a ¼ cup of water. Stir until the meat is completely coated. Remove from the heat and add into the Dip at the same time you would add the black beans and corn. With chicken: Add 1 cup of cooked, shredded chicken at the same time the black beans and corn are added. I like to use my Dutch oven shredded chicken for this purpose.