In a large skillet over medium heat, heat coconut oil.
To the skillet, add the next 4 ingredients (steak through salt and pepper) and cook for 10 minutes, until steak is to desired level of doneness and mushrooms are tender.
Allow to cool and set aside.
In a large bowl toss the steak mixture and the lettuce, radishes, and onion.
In a small bowl, whisk the remaining 3 ingredients (olive oil through vinegar) along with sea salt and