I've made this a couple times for dinner. It really does go together quickly, and it tastes good too. The original recipe calls for 1 lb. of ground beef, but I like things better without so much meat, so I cut it in half. I do that with most of my recipes. If you're a big carnivore, feel free to use the whole pound.
This recipe is very adaptable - add some chopped onion with the ground beef, use black beans or pinto beans, use flour tortillas or stir in some tortilla chips for some added crunch. Feel free to add your favorite toppings or sides - shredded lettuce, tomato, avocado, rice, etc. You can also serve the sour cream and green onion on the side and let everyone top their own servings the way they want.