Add your minced parsley, minced garlic, lime juice, olive oil, avocado, and some salt and pepper to a medium bowl.
Using a fork, stir the chimichurri together while also mashing the avocado with the fork until the avocado has mostly mixed into the sauce with just tiny chunks remaining.
Season to taste with salt and pepper!
Notes
This is FANTASTIC over grilled flank steak, but it would also be delicious over fish, chicken, pork, shrimp, or veggies!