Generously rub the spice on both sides of the flat iron steak and allow to stand at room temperature for at least 30 minutes and up to an hour before cooking.
Caramelized Shallots
Prepare shallots.
Grilling the Steak
Heat a cast iron skillet on medium high heat on your stove top for 2 or 3 minutes. Drop a bead of water on the skillet to test whether it's hot enough, if the water beads and disappears, the pan is hot.
Place the steak on the skillet and sear for 3 minutes, then turn and sear the second side for another 3 minutes.
Remove from skillet and allow to rest for about 10 minutes.
After 10 minutes, slice into generous 1 inch slices
