Grilled Chimichurri Flank Steak

Name: Grilled Chimichurri Flank Steak
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American, Latin American
Ingredients: 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)