Grilled Chimichurri Flank Steak

Bahan-bahan (6 porsi)

• 1 1/2 pounds flank steak
• 1 teaspoon garlic powder
• 3/4 teaspoon ground cumin
• 1/2 teaspoon dried oregano
• fresh black pepper (to taste)
• 1 1/4 teaspoons kosher salt
• 1/3 cup packed fresh parsley (minced fine, no stems)
• 2 tablespoons red onion (finely chopped*)
• 4 cloves garlic (minced)
• 2 tablespoons extra virgin olive oil
• 3 tablespoons red wine vinegar
• 1 tablespoon water
• 1/4 teaspoon kosher salt
• 1/8 teaspoon fresh black pepper
• 1/8 teaspoon crushed red pepper flakes (or more to taste)