First, you need a ripe avocado and a bottle of Cholula chili-lime hot sauce. (OMG. I love it -- I could *drink* this stuff!!)
Mash the living hell out of the avocado and add as much sauce as you can stand!
When it's done, might look kinda brown. (If you care, add some cilantro, green onion, even parsley or tomatillos to even out the color.)
Close enough! :)