1 (16 ounce) package Velveeta (pasteurized processed cheese product - I include this so that the food snobs know that I know it isn't really cheese, but I include this note so that they know that I don't care...this time.)
1 (16 ounce) jar salsa, hot or mild - your choice
1 (10 ounce) box frozen spinach, thawed and drained WELL
1/2 - 3/4 cup sour cream
Cube the Velveeta into 1/2-inch portions.
Make sure the spinach is thoroughly drained. (I first squeeze in a colander, and then place in a clean kitchen towel and wring the heck out of it.)
In a large, microwave-safe bowl, combine the Velveeta cubes, salsa (I use a pint of my home-canned Basic Salsa, but use your favorite. The ones available with black beans and corn would add interesting dimension.), and spinach.
Microwave on HIGH for 3 minutes.
Stir to combine the melty cheese with the other ingredients.
Return to the microwave and cook on HIGH for 2 more minutes, and stir again.
Repeat heating in 2 minute increments as needed until cheese is fully melted.
Stir in the sour cream.
Heat again for 1 minute.
Serve with your favorite tortilla chips for dipping.