Chimichurri Sauce

Bahan-bahan (6 porsi)

• 1 ⅓ cups fresh parsley (packed)
• ⅓ cup olive oil (more as needed)
• 2 tablespoons fresh oregano (or 2 teaspoons dried oregano)
• 2 tablespoons minced white onion (or the whites of 2 green onions)
• 1 tablespoon red wine vinegar
• 1 clove garlic (minced)
• ½ teaspoon red pepper flakes (or to taste)
• ¼ teaspoon salt (or to taste)
• ¼ teaspoon black pepper