I saw this on the back of a Velveeta Shells and Cheese box. It turned out to be really yummy!!
1 package Velveeta Shells and Cheese Dinner
1 lb. ground beef (as always, I substitute this with soy crumles)
1 package Taco Seasoning Mix
3/4 cup Water
3/4 cup Sour Cream
3/4 cup Shredded Cheddar Cheese
3/4 cup Salsa
Preheat oven to 400 degrees. Prepare the Velveeta Shells and Cheese as you usually would. When this is done and you are adding the cheese mix also add ALL of the sour cream.
Brown meat (or soy) and drain fat if needed. Add water and taco seasoning mix. Simmer for 5 minutes.
In an 8 inch square baking dish, add half of the Velveeta mixture. Top with meat, half of the shredded cheese, and the rest of the Velveeta mixture.
Cover and bake for about 15 minutes. When it is done, top with salsa and the remain shredded cheese (I actually added the other half on top of the mixture before baking it).
In your own bowl (or plate) top with some crushed tortilla chips.
The actual recipe says to add it to the dish, but if you have leftovers (and we did because it is only the two of us!) the chips will get soggy.