A very very loose recipe, which should be adapted to your taste.
2-3 cloves garlic
1 small bunch fresh oregano, rough chop
1 small bunch fresh cilantro, rough chop
1 bunch fresh parsley, rough chop
1/4 tsp red pepper flakes
3 Tbsp red wine vinegar
1/4 cup olive oil
kosher salt, to taste
1. Combine herbs, red pepper flakes and red wine vinegar in a food processor and pulse until finely chopped.
2. Transfer to a small bowl and stir in the olive oil.
3. Season with salt, to taste.
Serve atop grilled skirt steak and you will be happy happy happy.