Whisk together all ingredients for the marinade. Place steak in a shallow bowl or in a ziploc bag and pour marinade on top. Mix to coat, cover, and place in refrigerator to marinate for a minimum of 30 minutes, overnight is best.
While meat marinates, place all ingredients for the dressing in a bowl, except for the olive oil, and whisk. While continuously whisking, pour olive oil in the bowl and whisk until completely combine. Set aside in a closed container in the fridge until needed.
Once meat has marinated, place a grill pan over medium-high heat (you can also do this on a grill, i just don’t have one right now) and once the pan is hot, place meat on top to cook for 6 minutes per side (depending how thick your steak is), until medium rare in the middle. Set aside and cover with foil to let rest.
On that same hot pan, add 2 tablespoons of ghee along with the shiitake mushrooms, sprinkle them with salt, pepper, ginger and garlic and sauté until soft and cooked through.
Now to make the salad: place greens and cucumber in a large bowl, pour desired amount of dressing on top and toss to coat. Then thinly slice the steak against the grain, place on top of greens along with some thinly sliced pear and some cilantro. Then eat up!!