Scoop the flesh from two of the avocados into the bowl of a food processor, (I use my Vitamix).
Roughly chop the kale and add it, along with the lemon juice, to the food processor.
Pulse until smooth. (Add a tiny splash or two of water if needed to help thin to a mixable consistency.)
Scoop the flesh from the two remaining avocados into a medium mixing bowl. Gently fork mash, being careful to leave it fairly chunky.
Add the avocado puree from the food processor to the mixing bowl, along with the onions, a pinch of paprika and a pinch of salt. Mix.
Season with additional salt to taste before serving.
Serve with your favorite chips or use on tacos, sandwiches, burgers.