Mix together all of the ingredients in a large bowl.
1 Onion, 1 Tablespoon Cumin, 1 Tablespoon Chili Powder, 2 Limes, 1 Tablespoon Honey, 1 teaspoon Kosher Salt, 1/2 teaspoon Fresh, 1 Tablespoon Vinegar, 2 Tablespoons Olive Oil, 2 Cloves Garlic, 1/2 Cup Cilantro, Crushed red pepper flakes to taste
Add the flank steak and toss to coat.
1 Flank Steak
Wrap the bowl with saran wrap and place in the fridge to marinate for 3 hours or overnight. Overnight is clearly better for flavor, but even an hour of marinating is better than none at all.
Remove the meat from the fridge and let rest on the counter for 5-7 minutes to take the chill off the meat.
Heat a grill to high heat and place the meat directly on the grill.
Grill the meat for about 4-7 minutes per side depending on the size of the meat. Flank steak should be cooked to medium for the best flavor and texture.
Remove from the grill and tent with foil for 5-10 minutes.
Slice thin and drizzle with the chimichurri.
Mango ChimiChurri
In a small bowl whisk together the vinegar, olive oil, sea salt, pepper, red pepper flakes, oregano and garlic.