I was smitten with guasacaca sauce the first time I went to Valencia Luncheria in Norwalk, CT. Each table has its own squeeze bottle of the stuff, for you to use as you like. The restaurant is well known for their arepas, a Venezuelan specialty, which taste awesome slathered with the guasacaca. But pretty much anything you put this sauce on will taste awesome, like carnitas, or hot dogs, or eggs. Anything. You'll be tempted to drink it. Try to restrain yourself. My recipe is adapted from every guasacaca recipe I could find on The Google, and my memory of the sauce at Valencia Luncheria.
I use the leaves and legs of the parsley and cilantro. Lots of flavor in the legs. Make sure you give the herbs a good rinse, to wash off any dirt. Spin them dry, or roll them in some paper towels, and you're good to go.
Be careful with your onion. Half of a medium onion is just about a half cup worth. Use any more and the onion will overpower the sauce. —mrslarkin
about 2 cups
really big handful cilantro, like a hefty cup and a half
really big handful flat leaf parsley, like a hefty cup and a half
medium yellow onion, peeled and cut into a few pieces.
green bell pepper, seeded and cut into a few pieces
large ripe Haas avocado, cut into fourths and peeled
garlic clove, cut in half
small jalapeno, cut into fourths and seeded
white vinegar, plus more if needed
olive oil, plus more if needed
fresh squeezed lime juice, plus more if needed