Ingredients :

1/4 cup distilled white vinegar
2 x jalapenos roughly chopped
4 x garlic cloves
4 x bay leaves
1/2 cup freshly-chopped Italian parsley
1/2 cup freshly-chopped cilantro
1/2 cup freshly-chopped oregano
1/3 cup extra-virgin olive oil
Salt to taste
Freshly-ground black pepper to taste
1 x flank steak - (1 1/2 to 2 lbs)

Method :

* Preheat a grill or broiler to high.
* In a blender,combine vinegar,jalapeno,garlic,and bay leaves puree until smooth.Transfer to a bowl and add the herbs.Whisk in the olive oil and season with salt and pepper.Mix well and set aside.
* Season the flank steak with olive oil,salt,and pepper and grill/broil the steak for 2 to 3 minutes per side for medium-rare.Slice the steak thinly,across the grain on the bias and serve with the chimichurri sauce.