I recently visited my brother and sister-in-law. She is a fabulous cook who learned from her mother growing up in Mexico City. She doesn't cook from recipes, but from memory and experience of how she was taught. We had a fabulous meal of beef tacos with this guacamole. I watched so I could make it at home. It's different than most because of the tomatillos, and it's wonderful with the beef. I posted the beef taco recipe separately.