Name: Daphne Oz's Philly Cheesesteak Tacos
Yield: 4
Ingredients: 2 tbsp unsalted butter 1 tsp Kosher salt 1 pound skirt steak 2 tbsp extra virgin olive oil 2 fresh oregano sprigs; or 1 tsp dried 1 medium onion; halved and thinly sliced 1 red bell pepper; cored; seeded; and thinly sliced 5 cremini or button mushrooms; stemmed with caps thinly sliced 4-6 6-inch flour tortillas 1 cup Monterey jack cheese or low-moisture mozzarella