I had some chicken I had cooked in salsa left in the fridge and needed a quick meal ready on time for someone who was dashing in and leaving again.
I don't have a photo of the chicken because it was blurry and I didn't realize it until just now. But...
You could use beef, or just beans for vegetarian, skip the cheese and sour cream for vegan, add corn or jalapenos for sweet/spicy flavor or adobo sauce for a smokey taste. Or instead of diced avocados use guacamole. Loads of options, I'm sure you can think of a few yourself, let me know what you like so I can try it!