Chop off any gross ends to on the mint and cilantro, remove skin from garlic and cut up jalapeno if you'd like (seeds are the spicy part, so add or don't - your preference!)
Toss everything into a food processor.
Blend to as fine as you'd like! For marinade, consider blending slightly longer. For steak/meat topping, leave it a little chunkier.
Move to bowl and serve!
Keyword chimichurri, chimichurri sauce, cilantro, cilantro sauce, mint sauce, sauce for meat, what to eat with lamb