Heat your oil in a large skillet over medium-high heat.
Add in the mushrooms and cook, undisturbed, for 2-3 minutes.
Add in the butter, and once melted stir in your onion and garlic. Continue to cook for 2-3 minutes, stirring frequently.
Add in the wine or broth, and cook for about 2 minutes, or until liquid reduces by half.
Stir in the herbs and season with sea salt and pepper to taste.
Remove from heat and enjoy immediately!