Add 2 tablespoons oil to large, deep skillet.
Salt and pepper the steak slices and add to the oil.
Brown steak for 1-2 minutes. Then flip and cook another 1-2 minutes.
Remove steak and add rest of oil to the skillet.
Add broccoli, ginger, garlic, coconut aminos and red pepper flakes.
Cook broccoli, stirring occasionally, until broccoli is tender, about 5-7 minutes.
Add tapioca(or corn if not Whole 30) starch, if using, to thicken sauce.
Add steak back to the skillet and stir to incorporate all the ingredients.
Serve with cauliflower rice.