Season flank steak with salt and garlic pepper on each side.
To grill the flank steak, turn 2-3 burners on medium-high heat and let the grill preheat for 8-10 minutes until your grill reaches 450 degrees.
Put flank steak on for 5-6 minutes. Then flip for another 5-6 minutes on the other side. This will sear your steak. Then turn all burners on low and keep grilling until internal temperature reaches 140 degrees.
Once the flank steak has reached 140 degrees, remove from grill and wrap in foil for 8-10 minutes to let the steak “rest”.
While your steak is resting, make the chimichurri sauce (recipe found below).
Thinly slice the flank steak to prepare for your tacos.
I like to make “parmesan crusted” taco shells. To do this, simply lay 3 tortillas on a large skillet, lightly sprayed with olive oil spray & sprinkled with some parmesan cheese (yum!)
Evenly spread 3 oz. flank steak amongst the three taco shells & garnish with chimichurri sauce, avocado and fresh lime juice.