I do similar, but not so heavy on the cilantro. Yellow onions are fine, too, but not Vidalia. I don't use tomatillo. I mince my garlic. I only use fresh limes. The avocado to lime and garlic ratio is really important. If you get that how you like it, everything else is a snap. I hand mix mine so that it's more chunky and less homogeneous. It's the hit of every party. My problem is finding enough ripe avocados to make a quantity that feeds everyone.