For the salsa-like sauce: Add garlic to a small saucepan over low heat and just cover with olive oil. Cook, about 30 minutes. Add anchovies and continue to cook, using the back of a wooden spoon to break up the anchovies and garlic, until anchovies melt, about 15 minutes more. Remove from heat and set aside.
Preheat a grill for cooking over high heat.
Grill long hot peppers on each side until softened and lightly charred. Remove from grill, roughly chop and place in a large bowl. (Leave grill on.) Add the garlic-anchovy mixture and mix to combine. Add lemon zest and juice to taste. Mix to combine.
For the grilled skirt steak: Sprinkle skirt steak with salt and pepper. Grill steak about 2 minutes on each side for medium-rare. Remove from grill and allow to rest.
Slice steak on a bias and place on a serving platter. Top steak with salsa-like sauce. Sprinkle with parsley. Serve!
This recipe has been updated and may differ from what was originally published or broadcast.